NECO Biology Objective & Essay 2023: Questions and Answers A Comprehensive Guide

Neco biology objective & essay 2023: a comprehensive guide.

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NECO Biology Objective & Essay 2023 Questions and Answers:

NECO Biology Objective & Essay 2023: A Comprehensive Guide

Introduction:

Welcome to the ultimate guide for the NECO 2023 Biology Objective & Essay examination! Aspiring candidates, get ready to excel in one of the most crucial subjects in the National Examinations Council (NECO) assessment. This post will equip you with essential tips, strategies, and study resources to confidently tackle the Biology exam and achieve outstanding results.

Overview of the NECO Biology Examination: The NECO Biology examination is divided into two sections: Objective and Essay. The Objective section comprises multiple-choice questions that test your knowledge and understanding of various topics in Biology. The Essay section, on the other hand, requires you to provide detailed written responses to broader questions, demonstrating your analytical skills and comprehensive knowledge of the subject.

  • Know the Syllabus: The first step to excel in any exam is to be familiar with the syllabus. Obtain a copy of the NECO Biology syllabus for 2023 from the official NECO website or your school. Pay close attention to the topics and subtopics to structure your study plan accordingly.
  • Create a Study Plan: Now that you have the syllabus, develop a realistic and well-organized study plan. Allocate sufficient time for each topic, ensuring you cover the entire syllabus before the examination. Break down your study sessions into manageable chunks to avoid overwhelming yourself.
  • Utilize Quality Study Materials: Gather reputable study materials such as textbooks, past question papers, and study guides specifically designed for NECO Biology. These resources will help you gain a deeper understanding of key concepts and provide insight into the exam pattern.
  • Practice with Past Questions: Practicing past questions is an essential part of exam preparation. Familiarize yourself with the exam format, question types, and time constraints by solving previous years’ papers. This will help build your confidence and improve your speed and accuracy during the actual exam.
  • Seek Clarification: Don’t hesitate to seek help from your Biology teacher or subject experts if you encounter any challenges while studying. Clarifying doubts and misconceptions early on will ensure a better grasp of the subject.
  • Group Study and Discussions: Collaborate with classmates or form study groups to exchange ideas, discuss concepts, and solve problems together. This approach can deepen your understanding and provide different perspectives on complex topics.
  • Revise Regularly: Revisiting topics regularly is crucial to retain information. Create concise notes or flashcards to review important points, terminologies, and diagrams effectively.
  • Focus on Practical Knowledge: Biology is a subject that involves both theory and practical aspects. While studying, pay special attention to laboratory experiments, biological processes, and practical applications.

neco biology obj and essay 2023 questions and answers

NECO Biology Objective Section

Neco biology essay section, sample questions for practice, objective section:, essay section:.

Creating a well-structured study plan is essential to ensure effective preparation for the NECO Biology exam. Here’s a step-by-step guide to building a study plan:

  • Assess Available Time: Determine the total time available before the exam and calculate how many hours you can dedicate to studying each day or week. Be realistic about your commitments and set aside specific study periods.
  • Divide the Syllabus: Break down the NECO Biology syllabus into smaller units or topics. Allocate appropriate study time for each topic based on its complexity and your level of understanding.
  • Set Goals: Establish clear and achievable goals for each study session and for the overall preparation period. Having specific targets will help you stay motivated and track your progress effectively.
  • Prioritize Weak Areas: Identify the topics or concepts you find challenging and prioritize them in your study plan. Devote more time to understanding and practicing these areas to improve your comprehension.
  • Use Study Resources: Gather relevant study materials, including textbooks, past question papers, study guides, and online resources. Utilize reputable sources to ensure the accuracy and comprehensiveness of your preparation.
  • Plan Practice Sessions: Allocate time for regular practice sessions using past question papers and sample tests. This will help you become familiar with the exam format and improve your time management skills.
  • Mix Study Techniques: Incorporate a variety of study techniques, such as reading, note-taking, summarizing, and flashcards, to keep your study sessions engaging and enhance retention.
  • Create a Study Schedule: Design a daily or weekly study schedule that outlines which topics you’ll cover on specific days. Stick to the schedule and make adjustments if necessary to maintain consistency.
  • Include Breaks: Avoid burnout by scheduling short breaks between study sessions. Taking regular breaks allows your brain to rest and helps maintain focus during study hours.
  • Review Regularly: Set aside time for regular revision of previously covered topics. Reviewing frequently will reinforce your understanding and prevent forgetting important information.
  • Seek Help: If you encounter difficult concepts or have questions, don’t hesitate to seek help from your Biology teacher or classmates. Clearing doubts early on will ensure a solid foundation for the exam.
  • Practice Mock Exams: As the exam date approaches, conduct mock exams under timed conditions to simulate the actual exam environment. This will boost your confidence and readiness for the real exam.
  • Stay Healthy: Maintain a healthy lifestyle during your preparation period. Get enough sleep, eat nutritious meals, and engage in physical activities to keep your mind and body in top shape.

Remember, consistency, dedication, and discipline are the keys to successful exam preparation. Stick to your study plan, stay positive, and believe in your abilities. Good luck with your NECO Biology exam!

Conclusion:

Mastering Biology for the NECO 2023 exam requires dedication, consistent effort, and a structured study plan. By following the tips outlined in this post, you can confidently approach both the Objective and Essay sections of the NECO Biology examination. Remember to stay calm and focused during the exam, and best of luck on your journey to academic success!

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NECO Biology Questions and Answers For 2023/2024 (Theory and Objectives)

Biology NECO Questions 2023. I will be showing you the NECO Biology objective and theory questions and answers for free in this post. You will also understand how NECO Biology questions are set and how to answer them.

The National Examinations Council (NECO ) is an examination body in Nigeria that conducts the Senior Secondary Certificate Examination and the General Certificate in Education in June/July and December/January respectively.

Table of Contents

NECO Biology Question and Answers Essay and OBJ (Expo)

The 2023 NECO Biology expo will be posted here today 21st July during the NECO Biology examination. Keep checking and reloading this page for the answers.

NECO 2023 Biology Answers Loading.. .

OBJ Answers:

1-10: BBEDACCAEE

11-20: DDCEABDAEC

21-30: EBBBEADBDD

31-40: EDACCCBCEA

41-50: EBBCACBAEC

51-60: DDABBDDDBE

NECO Biology Essay Answers:

The cell theory states that:

– All living organisms are made up of one or more cells.

– The cell is the basic unit of life.

– All cells arise from pre-existing cells.

– Robert Hooke, who discovered cells in 1665 and coined the term “cell”.

– Matthias Schleiden and Theodor Schwann, who proposed the cell theory in 1839-1840.

– Large, brightly colored petals that attract insects.

– Nectar-producing glands to feed the insects.

– A strong, sweet fragrance to attract the insects.

– A landing platform for the insects to rest on.

– Pollen that is sticky and easily attaches to the insects.

– Ginger: Rhizome

– Banana: Rhizome

– Sweet potato: Tuber

– The mouth mechanically breaks down the bread by chewing and mixes it with saliva, which contains enzymes that begin breaking down the carbohydrates in the bread.

– The esophagus moves the food down to the stomach, where it is mixed with stomach acid and enzymes that further break down the bread.

– The small intestine absorbs the nutrients from the bread, such as carbohydrates, proteins, and fats, into the bloodstream.

– The large intestine absorbs water and electrolytes from the remaining food waste, forming feces.

– The rectum stores feces until they can be eliminated through the anus.

Amoeba —> Hydra —> Tilapia —> Toad —> Snake.

(i) Small, lightweight seeds that can be easily carried by the wind.

(ii) Hairs or wings on the fruit that increase surface area and help to catch the wind.

(iii) A dry, papery fruit that splits open easily to release the seeds.

To determine if the shoot of a plant is positively phototropic.

=Apparatus:=

A potted plant, a light source, a ruler, a marker.

=Method/Procedure:=

(i) Place the plant in a dark room for 24 hours to ensure that it is not positively or negatively phototropic.

(ii) Place the light source at a fixed distance from the plant, with the light shining directly on the plant’s shoot.

(iii) Turn on the light source and leave it on for 24 hours.

(iv) After 24 hours, measure the distance between the tip of the shoot and the light source.

(v) Mark the new position of the shoot tip on the ruler.

(vi) Repeat the experiment two more times, moving the light source to a different position each time.

=Observation:=

The shoot of the plant will grow towards them light source, bending in the direction of the light.

=Conclusion:=

The shoot of a plant is positively phototropic and grows towards a light source.

=Aerobic Respiration=

(i) Occurs in the presence of oxygen

(ii) Produces a large amount of ATP

(iii) Carbon dioxide and water are produced as waste products

=Anaerobic Respiration=

(i) Occurs in the absence of oxygen

(ii) Produces a small amount of ATP

(iii) Lactic acid or ethanol is produced as a waste product.

=Complete Metamorphosis=

(i) Four distinct stages: egg, larva, pupa, adult.

(ii) Larva looks completely different from the adult.

=Incomplete Metamorphosis=

(i) Three stages: egg, nymph, adult.

(ii) Nymph looks similar to the adult, just smaller.

– Aim: To determine if chlorophyll is necessary for photosynthesis to take place.

– Apparatus: Two plants of the same species, one with leaves covered in aluminum foil, a light source, test tube, water, and a beaker.

– Method/procedure: Place one plant in a dark room and cover its leaves with aluminum foil. Place the other plant in front of a light source. After a few hours, pluck a leaf from each plant and place them in separate test tubes filled with water. Place the test tubes in a beaker and keep them in the dark.

– Observation: After a few hours, observe the test tubes to see which one has produced more oxygen bubbles.

– Conclusion: If the test tube with the leaf from the plant exposed to light produces more oxygen bubbles, then chlorophyll is necessary for photosynthesis to take place.

(i) Overuse of synthetic fertilizers

(ii) Overgrazing

(iii) Deforestation

(iv) Soil erosion

(i) Hearing loss

(ii) Sleep disturbance.

(i) Crop diversity: Planting different crops in the same field over time to avoid the buildup of pests and diseases.

(ii) Soil health: Planting crops that have different nutrient requirements to maintain soil fertility and prevent soil erosion.

(iii) Pest management: Planting crops that are not susceptible to the same pests and diseases in succession.

(i) Reduced leaves or spines to minimize water loss through transpiration.

(ii) Thick cuticles and waxy coatings to reduce water loss through the epidermis.

(iii) Deep roots to tap into underground water sources.

(iv) CAM photosynthesis to reduce water loss during photosynthesis.

(v) Ability to enter dormancy during drought periods.

(i) Similarity in bone structure between birds and reptiles, especially in the skull and pelvis.

(ii) Presence of scales on bird feet and legs, which are also found in reptiles.

(iii) Similarity in egg-laying and incubation between birds and reptiles.

(i) Detoxification of harmful substances in the blood.

(ii) Production of bile to aid in digestion.

(iii) Storage of glycogen, vitamins, and minerals.

(iv) Regulation of blood glucose levels.

(v) Production of blood clotting factors.

(i) Reforestation: Planting new trees in areas where forests have been cleared or degraded.

(ii) Reduced impact logging: Using sustainable logging practices that minimize damage to the forest ecosystem.

(iii) Protected areas: Establishing and maintaining protected areas for wildlife and biodiversity conservation.

(iv) Community forestry: Encouraging local communities to manage forests sustainably for their own benefit and for the benefit of future generations.

neco biology obj and essay 2023 questions and answers

(i) Protection: the calyx protects the flower bud before it opens and the developing fruit after fertilization.

(ii) Support: the sepals of the calyx can provide support for the petals and reproductive structures.

(i) Insulin: regulates blood sugar levels.

(ii) Estrogen: regulates female reproductive system and secondary sexual characteristics.

(iii) Testosterone: regulates male reproductive system and secondary sexual characteristics.

(iv) Adrenaline: prepares the body for “fight or flight” response to stress.

(v) Melatonin: regulates sleep-wake cycles.

(i) Gene therapy: correcting genetic disorders by introducing functional genes into the patient’s cells.

(ii) Predictive medicine: using genetic testing to identify individuals who are at risk for certain diseases and develop personalized prevention or treatment plans.

(i) Large surface area: to maximize light absorption.

(ii) Thin and flat shape: to reduce the distance that light needs to penetrate into the leaf.

(iii) Chlorophyll pigments: to absorb light energy and convert it into chemical energy.

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NECO Biology Questions and Answers For Practice

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The questions below are the NECO past questions and answers that will help you in your 2023 NECO Biology Questions.

1. Plants are classified into the following classes except

(a)Bryophyte.

(b) Coelenterate.

(c) pteridophyta.

(d) thallophyta.

(e) Spermatophyte.

2. The cell wall of plants is rigid due to the presence of?

(a) Cambium

(b) cellulose

(d) chloroplast

3. The structure responsible for the transportation of mineral salt from the root to other parts of the plant is?

(a)Collenchyma

(d) sclerenchyma

4. Which of the following cell organelles traps sunlight energy in plant?

(a)Chloroplast

(b) Endoplasmic reticulum

(c) Mitochondrion

(d) Ribosome (e) Vacuole

5. The following conditions are necessary for photosynthesis except

(a) Carbon(iv)oxide.

(b) chlorophyll

(c) light energy

6. Which of the following organisms carries out photosynthesis?

(c) paramecium

(d) plasmodium

7. Which of these is an amphibian?

8. A flower with two or more fused carpels is called

(a) Apocarpous

(b) monocarpous

(c) polycarpous

(d) pistillate

(e) syncarpous

9. The response of plants to the stimulus of touch is called?

(a) Chemotropism

(b) geotropism

(c) hydrotropism

(d) phototropism

(e) thigmotropism

10. Which of the following is a bryophyte?

(a) Bladder wort

(b) Fly trap

(c) Liver wort

(d) Pitcher

11. Cellular respiration occurs in the

(a) Chloroplast

(b) endoplasmic reticulum

(c) food vacuole

(d) mitochondrion

(e) nucleus

12. In a moss plant, spores are produced in the

(a) Capsule

(c) rhizoid

13. Exoskeleton is a characteristic feature of

(b) earthworm

(d) millipede

(e) tapeworm

14. Which of the following influences growth in plants?

(a) Acetic acid

(c) Chlorophyll

(d) Ethylene

15. Land snail belongs to the phylum

(a) Annelida

(b) Arthropoda

(c) Echinodermata

(d) Mollusca

(e) nematode

16. The opening of the anthers and stigmas of a bisexual flower at the same time is called

(a) Cleistogamy

(b) dichogamy

(c) homogamy

(d) protandry

(e) protogyny

17. The following are the effect of auxins on plant except in

(a) Flowering

(b) fruiting without fertilization

(c) ripening of fruits

(d) root formation

(e) stem elongation

2020 neco  biology questions and answers

Use the diagram below to answer questions 18 and 19.

18. The  diagram represents the internal structure of a

19. The part labeled I is the

(b) endodermis

(c) phloem (d) root hair (e) xylem

20. Which of these is a water soluble vitamin?

(a) A 

21. The following diseases are airborne except

(a) Clolera

(b) measles

(c) meningitis

(d) pneumonia

(e) small pox.

22. The excretory organ of insects is called

(a) Contractile vacuole

(b) flame cell

(d) malphighian tubule

(e) nephridium

23. Which of these animals undergo metamorphosis

24. Villi are finger-like structures found in the

(a) Large intestine

(c) small intestine

(d) stomach

(e) tongue.

25. In mammals, sperms are formed in the

(a) Cowper’s gland

(b) scrotal sac.

(c) seminal vesicle 

(d) seminiferous tubules

(e) vas deferens

26. Which of the following is not a part of the mammalian brain?

(a) Cerebellum

(b) cerebrum

(c) Olfactory lobe

(d) spinal cord

(e) Thalamus

27. In plant, Chlorosis is caused by the deficiency of

(b) magnesium

(c) nitrogen

(d) potassium

(e) Sulphur

28. Which of the following diseases is not sexually transmitted

(b) Hepatitis

(d) influenza

(e) Syphilis

29. Which of the following is not a caste in a termitarium.

(d) soldiers

(e) workers

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30. The structure responsible for excretion in tape worm is called

(a) Cell membrane

(b) contractile vacuole

(c) flame cell

(d) malphigian tubule

31. The mode of nutrition of mushroom is

(a) autotrophic

(b) epiphytic

(c) parasitic

(d) saprophytic

(e) symbiotic

32. The earthworm is an example of

(b) Coelenterata

(c) Mollusca

(d) nematoda

(e) Platyhelminthes

33. Fat and oil are also known as

(b) fatty acids

(c) glycerol

(e) carbohydrates

34. Gaseous exchange in the lungs occurs at the

(a) Alveolus

(b)bronchus

(c)bronchiole

(e) trachea

35. The following are pigment except

(c) chromatophores

(d) haemoglobin

(e) melanin

neco biology questions and answers

Use the diagram  below to answer questions 36 – 38.

36. The type of placentation shown above is found in

(a) cana lily

(d) pride of Barbados

(e) sunflower

37. the part labeled x is the

(c) placenta

38. the type of placentation represented in the diagram is

(c) free central

(d) marginal

(e) parietal

39. the growth that occurs at the tip of shoot and root is called

(a) allometric

(c) isometric

(d) primary

(e) secondary

40. carnassial teeth are found in

41. Which of the following bones is not a part of axial skeleton?

(a) Backbone

(e) Sternum  

Use the diagram below to answer questions 42 and 43

2020 neco biology questions and answers

42. The part labeled ii is the

(b) hyaline cartilage

(c) ligament

(d) synovial  cavity

(e) synovial membrane

43. The function of the part labeled iii is to

(a) Soften the bones

(b) join bones together

(c) lubricate joints

(d) protect bones from wearing

(e) reduce friction at joints

44. The part that supplies food and oxygen to the eye is

(a) Choroids

45. The part of the male reproductive system that stores sperm is

(b) epididymis

(c) prostate gland

(d) seminal  vesicle

(e) vas deferens.

46. An organ in bird that grinds its food is

(c) gizzard

47. Which of the following animals exhibit basking

48. The following are functions of the sympathetic nervous system except

(a) Dilation of pupil of eye.

(b) inhibition of saliva secretion

(c) reduction of blood pressure

(d) reduction of urine output

(e) stimulation of ejaculation

49. The following homeostatic mechanisms are carried out by mammals except

(a) Excretion

(b) osmoregulation

(c) pH regulation

(d) reproduction

(e) thermoregulation

50. Part of the brain that controls blood pressure is called

(c) corpus callosum

(d) medulla oblongata

(e) pons varolii

51. Haemorrhage is caused due to the deficiency of vitamin

52. The control method of pests using predators is called

(a) Biological

(b) chemical

(c) cultural

(d) mechanical

(e) physical

53. The following are vectors except

(a) Black fly

(b) butterfly

(c) housefly

(d) mosquito

(e) tsetse fly

54. The deficiency of proteins in a developing child result in

(a) Beri beri

(b) kwashiorkor

(c) night blindness

(d) rickets

55. The theory of “use and disuse” of body parts was propounded by

(a) Carl Linneaus

(b) Charles Darwin

(c) Gregor Mendel

(d) Jean Lamarck

(e) Robert Hooke

56. The knowledge of heredity and variation are not required in

(a) Blood transfusion

(b) crime detection

(c) determination of paternity

(d) longevity

(e) marriage

57. Which of these is not a pollutant

(a) Carbon dioxide

(b) Lead oxide

(c) Nitrogen gas

(d) Nitrogen oxide

(e) sulphur dioxide

58. The topmost layer of a typical soil profile is

(b) coarse sand

(c) fine sand

59. Plants that survive in marine habitats are called

(a) Halophytes

(b) hydrophytes

(c) mesophytes

(d) saprophytes

(e) xerophytes

60. The felling of trees in a forest is called

(a) Afforestation

(b) deforestation

(c) desertification

(d) forest pruning

(e) re-afforestation        

Answer any three questions only

1a. State one role each of the following in photosynthesis

(i) Sunlight

(ii) Chlorophyll

b. List five types of bones found in the forearm of man

c. Mention three functions of a worker caste in termitarium

d. Define ecosystem

e. Draw a well labelled diagram (8-10cm long) of the nephron

2a. Define the following

(ii) Implantation

(iii) Species

(iv) Saprophytes

b (i) State four functions of the mammalian skeleton

(ii) Mention two muscles that bring about movement of a forearm

(iii) Name three digestive enzymes found in the small intestine and state one function of each

3a. (i) Mention three diseases of the liver

(ii) In a tabular form, state five differences between plant and animal cells

b. Using annotated diagrams only, illustrate the carbon cycle.

c. (i) List two types of supporting tissues in plant

(ii) Give two characteristics of a reptile

4a. Define the following terms

(i) Diffusion

(ii) Osmosis

(iii) plasmolysis

b (i) State four effects of overcrowding

(ii) mention two ways of conserving wildlife.

(iii) Give two examples of social animals

c (i) Define metamorphosis

(ii) List two examples of insects that undergo incomplete metamorphosis

(iii) Give two examples of a berry fruit

5a. (i) Draw a well labelled diagram (8-10cm long) of the human alimentary canal

(ii) Complete the table below

Part of digestive systemEnzymes present
1Mouth
2Renin
3Small intestine

b. T T and t t are monohybrid plants representing tallness and shortness respectively

  • By means of crossing, show the F1 generation
  • Using punnet square method, show the F2 generation
  • Give the phenotypic ratio of the F1 and F2 generations shown above

That’s all about NECO Biology Questions and Answers for 2022 (Theory and Objectives). If you have any questions, kindly drop your question in the comment box.

Last Updated on July 21, 2023 by Admin

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NECO ANSWERS , Past Questions & Answer

2023 NECO: Biology Essay And Objectives Questions with Solutions

neco biology obj and essay 2023 questions and answers

NECO BIOLOGY ESSAY SOLUTIONS

a (i) the cell Theory state that all living things are made up of a cell which is the structural and functional unit of life. That new cells arise from pre-existing cells by cell division.

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  • Robert Hooke
  • Matthias schleiden
  • The flowers are large
  • Possesses nectar
  • The flowers are brightly coloured to attract insects pollination.
  • Its pollen grains are heavy and sticky.
  • Ginger – by rhizome
  • Banana – by sucker
  • Sweet Potato – by tuber

c. When bread is ingested in the mouth, batang mixes it with saliva which contains ptyalin converting it into maltose. It enters the muscular chamber the stomach, it is churned and retained for three to four hours. It then passes to the small intestine where it is acted upon by amylopsin to complete breakdown to maltose and alkaline, intestinal juice that break down maltose to glucose. The glucose is absorbed and transported by capillaries to the liver which processes it. Undigested food passes to the large intestine where water is absorbed and makes the wastes to become semi solids called faeces. The faces then pass into the rectum and out of the body via the anus.

NUMBER FOUR

(4ai) (PICK ANY THREE) (i) The crops with tap roots should be followed by those with fibrous root system. (ii) Selection of the crop should be demand based. (iii) The selection of crops should be problem based. (iv) The selection of crops should suit to the farmer’s financial conditions. (v) More exhaustive crops should be followed by less exhaustive crops. (vi) The crops selected should also suit to the soil and climate conditions. (vi) The crops selected should also suit to the soil and climate conditions.

(4aii) (PICK ANY FIVE) (i) The presence of thick, waxy cuticles on leaves: (ii) Stomata present in the upper epidermis only: (iii) Shrinking of hinge cells when flaccid: (iv) Flashy succulent leaves: (v) Have reduced number of stomata: (vi) Sunken stomata or presence of crypts and leaf surface covered with fine hairs. (vii) Closed stomata in the presence of light and opened stomata in the absence of light: (viii) Leaves are reduced to spines, needles, or scales and they are folded or rolled when flaccid

(4bi) (i) Feathers : Feathers are modified scales that provide insulation and enable flight in birds. Some fossil reptiles, such as Archaeopteryx and Microraptor, also had feathers, suggesting that they were an ancestral trait that evolved before the divergence of birds and reptiles. (ii) Bones : Birds have hollow bones that reduce their weight and enhance their flight ability. Some fossil reptiles, such as Coelophysis and Pterosaurs, also had hollow bones, indicating that they were an adaptation to a fast and agile lifestyle. (iii) Eggs : Birds lay hard-shelled eggs that protect their embryos from dehydration and predation. Reptiles also lay hard-shelled eggs, implying that they share a common reproductive strategy that originated in their ancient ancestors.

(4bii) (PICK ANY FIVE) (i) Regulates amino acids. ((ii) Regulates blood clothing (iii) Stores Vitamins and Minerals. (iv) Processes glucose (v) Filters blood (vi) Bile production (vii) Albumin production (viii) Resists infections.

(4c) (PICK ANY FOUR) (i) Reforestation. (ii) Afforestation (iii) Protect Existing Forests. (iv) Sustained Yield Method. (v) Produce Less Waste (vi) Monitor Agriculture (vii) Planned and Regulated Tree-cutting (viii) Laws and Rules Help Prevent Deforestation.

(5bi) (PICK ANY TWO) (i) Calyx protects the flowers in bud condition from the outer injury. (ii) The calyxes are usually green in colour, but sometimes, it may be coloured as petalloid, which attract insects and helps in pollination. (iii) In certain cases, calyx develop spur and can store nectar and helps in seed dispersal.

(5bii) (PICK ANY FIVE) (i) Testosterone (ii) Thyroxine (iii) Estrogen (iv) Adrenaline (v) Epinephrine (vi) Progesterone (vii) Glucagon (viii) Growth hormone (ix) Cortisol (x) Gonadotropin releasing hormone (GnRH).

(5ci) (PICK ANY TWO) (i) Studies of inheritance (ii) Mapping disease genes. (iii) Diagnosis and treatment. (iv) Genetic counseling.

(5cii) (PICK ANY THREE ) (i) Chloroplast contains a photosynthetic pigment called chlorophyll. (ii) The stomata are located on the backside of the leaves which helps regulate water loss from the leaves. (iii) Leaves have a thin structure so that they can provide a short distance for carbon dioxide to diffuse into leaf cells (iv) The veins of leaves help to transport maximum water molecules and water to all parts of the leaves. (v) The plant produces larger leaves, which means a larger surface area for maximum absorption of sunlight.

BIOLOGY OBJECTIVE SOLUTIONS 01-10: BBEDAACADA 11-20: DDCEADDAEC 21-30: BBBBEDDBDD 31-40: EDACCCBCEA 41-50: EBBCACBABC 51-60: DDABEDDDBE

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NECO Biology Questions and Answers 2023 (100% Sure) Theory & Obj Solution

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BIOLOGY-ANSWERS

NECO BIOLOGY ANSWERS •••••••••••••••••••••••••••••••••••••

INSTRUCTION; ANSWER THREE(3) QUESTIONS ONLY

(1ai) The cell theory states that: (i) All living organisms are made up of one or more cells. (ii) The cell is the basic unit of life. (iii) All cells arise from pre-existing cells.

(1aii) (i) Robert Hooke, who discovered cells in 1665 and coined the term “cell”. (ii) Matthias Schleiden and Theodor Schwann, who proposed the cell theory in 1839-1840.

(1bi) (i) Large, brightly colored petals that attract insects. (ii) Nectar-producing glands to feed the insects. (iii) A strong, sweet fragrance to attract the insects. (iv) A landing platform for the insects to rest on. (v) Pollen that is sticky and easily attaches to the insects.

(1bii) – Ginger: Rhizome – Banana: Rhizome – Sweet potato: Tuber

(1c) (i) The mouth mechanically breaks down the bread by chewing and mixes it with saliva, which contains enzymes that begin breaking down the carbohydrates in the bread. (ii) The esophagus moves the food down to the stomach, where it is mixed with stomach acid and enzymes that further break down the bread. (iii) The small intestine absorbs the nutrients from the bread, such as carbohydrates, proteins, and fats, into the bloodstream. (iv) The large intestine absorbs water and electrolytes from the remaining food waste, forming feces. (v) The rectum stores feces until they can be eliminated through the anus. •••••••••••••••••••••••••••••••••••••

(2ai) Amoeba —> Hydra —> Tilapia —> Toad —> Snake

(2aii) (i) Small, lightweight seeds that can be easily carried by the wind. (ii) Hairs or wings on the fruit that increase surface area and help to catch the wind. (iii) A dry, papery fruit that splits open easily to release the seeds.

(2b) =Aim:= To determine if the shoot of a plant is positively phototropic.

=Apparatus:= A potted plant, a light source, a ruler, a marker.

=Method/Procedure:= (i) Place the plant in a dark room for 24 hours to ensure that it is not positively or negatively phototropic. (ii) Place the light source at a fixed distance from the plant, with the light shining directly on the plant’s shoot. (iii) Turn on the light source and leave it on for 24 hours. (iv) After 24 hours, measure the distance between the tip of the shoot and the light source. (v) Mark the new position of the shoot tip on the ruler. (vi) Repeat the experiment two more times, moving the light source to a different position each time.

=Observation:= The shoot of the plant will grow towards them light source, bending in the direction of the light.

=Conclusion:= The shoot of a plant is positively phototropic and grows towards a light source.

=Aerobic Respiration= (i) Occurs in the presence of oxygen (ii) Produces a large amount of ATP (iii) Carbon dioxide and water are produced as waste products

=Anaerobic Respiration= (i) Occurs in the absence of oxygen (ii) Produces a small amount of ATP (iii) Lactic acid or ethanol is produced as a waste product

•••••••••••••••••••••••••••••••••••••

(3ai) – Rivers – Lakes

(3aii) TABULATE

=Complete Metamorphosis= (i) Four distinct stages: egg, larva, pupa, adult. (ii) Larva looks completely different from the adult.

=Incomplete Metamorphosis= (i) Three stages: egg, nymph, adult. (ii) Nymph looks similar to the adult, just smaller.

(3b) – Aim: To determine if chlorophyll is necessary for photosynthesis to take place.

– Apparatus: Two plants of the same species, one with leaves covered in aluminum foil, a light source, test tube, water, and a beaker.

– Method/procedure: Place one plant in a dark room and cover its leaves with aluminum foil. Place the other plant in front of a light source. After a few hours, pluck a leaf from each plant and place them in separate test tubes filled with water. Place the test tubes in a beaker and keep them in the dark.

– Observation: After a few hours, observe the test tubes to see which one has produced more oxygen bubbles.

– Conclusion: If the test tube with the leaf from the plant exposed to light produces more oxygen bubbles, then chlorophyll is necessary for photosynthesis to take place.

(3ci) (i) Overuse of synthetic fertilizers (ii) Overgrazing (iii) Deforestation (iv) Soil erosion

(3cii) (i) Hearing loss (ii) Sleep disturbance •••••••••••••••••••••••••••••••••••••

(4ai) (i) Crop diversity: Planting different crops in the same field over time to avoid the buildup of pests and diseases. (ii) Soil health: Planting crops that have different nutrient requirements to maintain soil fertility and prevent soil erosion. (iii) Pest management: Planting crops that are not susceptible to the same pests and diseases in succession.

(4aii) (i) Reduced leaves or spines to minimize water loss through transpiration. (ii) Thick cuticles and waxy coatings to reduce water loss through the epidermis. (iii) Deep roots to tap into underground water sources. (iv) CAM photosynthesis to reduce water loss during photosynthesis. (v) Ability to enter dormancy during drought periods.

(4bi) (i) Similarity in bone structure between birds and reptiles, especially in the skull and pelvis. (ii) Presence of scales on bird feet and legs, which are also found in reptiles. (iii) Similarity in egg-laying and incubation between birds and reptiles.

(4bii) (i) Detoxification of harmful substances in the blood. (ii) Production of bile to aid in digestion. (iii) Storage of glycogen, vitamins, and minerals. (iv) Regulation of blood glucose levels. (v) Production of blood clotting factors.

(4c) (i) Reforestation: Planting new trees in areas where forests have been cleared or degraded. (ii) Reduced impact logging: Using sustainable logging practices that minimize damage to the forest ecosystem. (iii) Protected areas: Establishing and maintaining protected areas for wildlife and biodiversity conservation. (iv) Community forestry: Encouraging local communities to manage forests sustainably for their own benefit and for the benefit of future generations.

(5a) DIAGRAM

(5bi) (i) Protection: the calyx protects the flower bud before it opens and the developing fruit after fertilization. (ii) Support: the sepals of the calyx can provide support for the petals and reproductive structures.

(5bii) (i) Insulin: regulates blood sugar levels. (ii) Estrogen: regulates female reproductive system and secondary sexual characteristics. (iii) Testosterone: regulates male reproductive system and secondary sexual characteristics. (iv) Adrenaline: prepares the body for “fight or flight” response to stress. (v) Melatonin: regulates sleep-wake cycles.

(5ci) (i) Gene therapy: correcting genetic disorders by introducing functional genes into the patient’s cells. (ii) Predictive medicine: using genetic testing to identify individuals who are at risk for certain diseases and develop personalized prevention or treatment plans.

(5cii) (i) Large surface area: to maximize light absorption. (ii) Thin and flat shape: to reduce the distance that light needs to penetrate into the leaf. (iii) Chlorophyll pigments: to absorb light energy and convert it into chemical energy.

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NECO BIOLOGY SOLUTIONS

INSTRUCTION; ANSWER THREE(3) QUESTIONS ONLY

(1ai) The cell theory states that: (i) All living organisms are made up of one or more cells. (ii) The cell is the basic unit of life. (iii) All cells arise from pre-existing cells.

(1aii) (i) Robert Hooke, who discovered cells in 1665 and coined the term “cell”. (ii) Matthias Schleiden and Theodor Schwann, who proposed the cell theory in 1839-1840.

(1bi) (i) Large, brightly colored petals that attract insects. (ii) Nectar-producing glands to feed the insects. (iii) A strong, sweet fragrance to attract the insects. (iv) A landing platform for the insects to rest on. (v) Pollen that is sticky and easily attaches to the insects.

  • Ginger: Rhizome
  • Banana: Rhizome
  • Sweet potato: Tuber

(1c) (i) The mouth mechanically breaks down the bread by chewing and mixes it with saliva, which contains enzymes that begin breaking down the carbohydrates in the bread. (ii) The esophagus moves the food down to the stomach, where it is mixed with stomach acid and enzymes that further break down the bread. (iii) The small intestine absorbs the nutrients from the bread, such as carbohydrates, proteins, and fats, into the bloodstream. (iv) The large intestine absorbs water and electrolytes from the remaining food waste, forming feces.

(v) The rectum stores feces until they can be eliminated through the anus.

(2ai) Amoeba —> Hydra —> Tilapia —> Toad —> Snake

(2aii) (i) Small, lightweight seeds that can be easily carried by the wind. (ii) Hairs or wings on the fruit that increase surface area and help to catch the wind. (iii) A dry, papery fruit that splits open easily to release the seeds.

(2b) =Aim:= To determine if the shoot of a plant is positively phototropic.

=Apparatus:= A potted plant, a light source, a ruler, a marker.

=Method/Procedure:= (i) Place the plant in a dark room for 24 hours to ensure that it is not positively or negatively phototropic. (ii) Place the light source at a fixed distance from the plant, with the light shining directly on the plant’s shoot. (iii) Turn on the light source and leave it on for 24 hours. (iv) After 24 hours, measure the distance between the tip of the shoot and the light source. (v) Mark the new position of the shoot tip on the ruler. (vi) Repeat the experiment two more times, moving the light source to a different position each time.

=Observation:= The shoot of the plant will grow towards them light source, bending in the direction of the light.

=Conclusion:= The shoot of a plant is positively phototropic and grows towards a light source.

(2c) [TABULATE]

=Aerobic Respiration= (i) Occurs in the presence of oxygen (ii) Produces a large amount of ATP (iii) Carbon dioxide and water are produced as waste products

=Anaerobic Respiration= (i) Occurs in the absence of oxygen (ii) Produces a small amount of ATP (iii) Lactic acid or ethanol is produced as a waste product

===================================

(3aii) TABULATE

=Complete Metamorphosis= (i) Four distinct stages: egg, larva, pupa, adult. (ii) Larva looks completely different from the adult.

=Incomplete Metamorphosis= (i) Three stages: egg, nymph, adult. (ii) Nymph looks similar to the adult, just smaller.

  • Aim: To determine if chlorophyll is necessary for photosynthesis to take place.
  • Apparatus: Two plants of the same species, one with leaves covered in aluminum foil, a light source, test tube, water, and a beaker.
  • Method/procedure: Place one plant in a dark room and cover its leaves with aluminum foil. Place the other plant in front of a light source. After a few hours, pluck a leaf from each plant and place them in separate test tubes filled with water. Place the test tubes in a beaker and keep them in the dark.
  • Observation: After a few hours, observe the test tubes to see which one has produced more oxygen bubbles.
  • Conclusion: If the test tube with the leaf from the plant exposed to light produces more oxygen bubbles, then chlorophyll is necessary for photosynthesis to take place.

(3ci) (i) Overuse of synthetic fertilizers (ii) Overgrazing (iii) Deforestation (iv) Soil erosion

(3cii) (i) Hearing loss

(ii) Sleep disturbance

(4ai) (i) Crop diversity: Planting different crops in the same field over time to avoid the buildup of pests and diseases. (ii) Soil health: Planting crops that have different nutrient requirements to maintain soil fertility and prevent soil erosion. (iii) Pest management: Planting crops that are not susceptible to the same pests and diseases in succession.

(4aii) (i) Reduced leaves or spines to minimize water loss through transpiration. (ii) Thick cuticles and waxy coatings to reduce water loss through the epidermis. (iii) Deep roots to tap into underground water sources. (iv) CAM photosynthesis to reduce water loss during photosynthesis. (v) Ability to enter dormancy during drought periods.

(4bi) (i) Similarity in bone structure between birds and reptiles, especially in the skull and pelvis. (ii) Presence of scales on bird feet and legs, which are also found in reptiles. (iii) Similarity in egg-laying and incubation between birds and reptiles.

(4bii) (i) Detoxification of harmful substances in the blood. (ii) Production of bile to aid in digestion. (iii) Storage of glycogen, vitamins, and minerals. (iv) Regulation of blood glucose levels. (v) Production of blood clotting factors.

(4c) (i) Reforestation: Planting new trees in areas where forests have been cleared or degraded. (ii) Reduced impact logging: Using sustainable logging practices that minimize damage to the forest ecosystem. (iii) Protected areas: Establishing and maintaining protected areas for wildlife and biodiversity conservation. (iv) Community forestry: Encouraging local communities to manage forests sustainably for their own benefit and for the benefit of future generations.

neco biology obj and essay 2023 questions and answers

(5bi) (i) Protection: the calyx protects the flower bud before it opens and the developing fruit after fertilization. (ii) Support: the sepals of the calyx can provide support for the petals and reproductive structures.

(5bii) (i) Insulin: regulates blood sugar levels. (ii) Estrogen: regulates female reproductive system and secondary sexual characteristics. (iii) Testosterone: regulates male reproductive system and secondary sexual characteristics. (iv) Adrenaline: prepares the body for “fight or flight” response to stress. (v) Melatonin: regulates sleep-wake cycles.

(5ci) (i) Gene therapy: correcting genetic disorders by introducing functional genes into the patient’s cells. (ii) Predictive medicine: using genetic testing to identify individuals who are at risk for certain diseases and develop personalized prevention or treatment plans.

(5cii) (i) Large surface area: to maximize light absorption. (ii) Thin and flat shape: to reduce the distance that light needs to penetrate into the leaf. (iii) Chlorophyll pigments: to absorb light energy and convert it into chemical energy.

neco biology obj and essay 2023 questions and answers

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Biology 2023

BIOLOGY OBJ

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2023 NECO THEORY ANSWERS

(1ai) The cell theory states that all living organisms are composed of cells, cells are the basic unit of life, and all cells come from pre-existing cells.

(1aii) (Pick any two)

i. Robert Hooke (1665) ii. Anton van Leeuwenhoek (1674) iii. Matthias Schleiden (1838) iv. Theodor Schwann (1839)

(1bi) Pick any five(5) i. Pollinated by insects ii. Usually have brightly colored petals iii. Have large amounts of nectar and pollen iv. Have a wide variety of shapes and sizes v. Have a shallow nectar cup vi. Have a strong scent to attract insects vii. Have a large number of stamens and pistils to ensure cross-pollination

(1bii) I. Ginger – Rhizomes II. Banana – Offsets/Suckers III. Sweet potato – Tubers

(1c) i. Mouth: The bread is chewed and mixed with saliva, which contains enzymes such as amylase that break down the carbohydrates in the bread into simpler sugars.

ii. Esophagus: The bread and saliva mixture is swallowed and passes down the esophagus to the stomach.

iii. Stomach: The stomach further breaks down the carbohydrates in the bread with acids and enzymes.

iv. Small Intestine: The broken-down carbohydrates are absorbed into the small intestine and converted into glucose and other simple sugars.

v. Large Intestine: The glucose and other simple sugars are absorbed into the large intestine, where they are further broken down by bacteria into fatty acids and other substances.

vi. Rectum: The fatty acids and other substances are absorbed into the rectum and passed out of the body as feces. ___________________ ____________________

(3ai) (PICK ANY TWO) I. Rivers II. Streams III. Ponds IV. Lakes V. Wetlands

(3aii) (Pick any Two)

TABULATE *Complete Metamorphosis:* i• Egg stage, Larva stage, Pupa stage, Adult stage ii• Development is gradual iii• Larvae and adults have different shapes and characteristics iv• Wings develop inside the pupal stage v• Development is slow

*Incomplete Metamorphosis:* i• Egg stage, Nymph stage, Adult stage ii• Development is abrupt iii• Nymphs and adults have similar shapes and characteristics iv• Wings develop outside the nymph stage v• Development is fast _____________________

NECO 2023 Biology Practical Answers

_____________________

3b (loading)…..

(3ci) Pick any four

i. Over-Fertilization: Excessive use of chemical fertilizers and pesticides can deplete the soil of essential nutrients and minerals, leading to poor soil fertility.

ii. Overgrazing: Overgrazing of livestock can cause soil erosion, compaction, and nutrient depletion.

iii. Deforestation: Removal of trees and other vegetation from the land can cause soil erosion and nutrient depletion.

iv. Monocropping: Growing the same crop in the same place year after year can lead to depletion of soil nutrients and increase the risk of pests and diseases.

v. Acid Rain: Acid rain can leach essential nutrients from the soil, leading to poor soil fertility.

(3cii) Pick any two i. Loss of Soil Fertility: Soil pollution can lead to loss of soil fertility due to the accumulation of toxic chemicals and other pollutants.

ii. Loss of Biodiversity: Soil pollution can lead to decreased biodiversity due to the destruction of habitats for organisms that rely on healthy soil.

iii. Contamination of Groundwater: Soil pollution can lead to contamination of groundwater due to the leaching of pollutants into the soil.

iv. Health Risks: Soil pollution can lead to health risks for humans and animals due to the presence of toxic chemicals in the soil.

v. Loss of Agricultural Productivity: Soil pollution can lead to decreased agricultural productivity due to the presence of pollutants in the soil.

(4ai) (i) Crop diversity: Planting different crops in the same field over time to avoid the buildup of pests and diseases. (ii) Soil health: Planting crops that have different nutrient requirements to maintain soil fertility and prevent soil erosion. (iii) Pest management: Planting crops that are not susceptible to the same pests and diseases in succession.

(4aii) (i) Reduced leaves or spines to minimize water loss through transpiration. (ii) Thick cuticles and waxy coatings to reduce water loss through the epidermis. (iii) Deep roots to tap into underground water sources. (iv) CAM photosynthesis to reduce water loss during photosynthesis. (v) Ability to enter dormancy during drought periods.

(4bi) (i) Similarity in bone structure between birds and reptiles, especially in the skull and pelvis. (ii) Presence of scales on bird feet and legs, which are also found in reptiles. (iii) Similarity in egg-laying and incubation between birds and reptiles.

(4bii) (i) Detoxification of harmful substances in the blood. (ii) Production of bile to aid in digestion. (iii) Storage of glycogen, vitamins, and minerals. (iv) Regulation of blood glucose levels. (v) Production of blood clotting factors.

(4c) (i) Reforestation: Planting new trees in areas where forests have been cleared or degraded. (ii) Reduced impact logging: Using sustainable logging practices that minimize damage to the forest ecosystem. (iii) Protected areas: Establishing and maintaining protected areas for wildlife and biodiversity conservation. (iv) Community forestry: Encouraging local communities to manage forests sustainably for their own benefit and for the benefit of future generations.

===================================

(5a) DIAGRAM

(5bi) (i) Protection: the calyx protects the flower bud before it opens and the developing fruit after fertilization. (ii) Support: the sepals of the calyx can provide support for the petals and reproductive structures.

(5bii) (i) Insulin: regulates blood sugar levels. (ii) Estrogen: regulates female reproductive system and secondary sexual characteristics. (iii) Testosterone: regulates male reproductive system and secondary sexual characteristics. (iv) Adrenaline: prepares the body for “fight or flight” response to stress. (v) Melatonin: regulates sleep-wake cycles.

(5ci) (i) Gene therapy: correcting genetic disorders by introducing functional genes into the patient’s cells. (ii) Predictive medicine: using genetic testing to identify individuals who are at risk for certain diseases and develop personalized prevention or treatment plans.

(5cii) (i) Large surface area: to maximize light absorption. (ii) Thin and flat shape: to reduce the distance that light needs to penetrate into the leaf. (iii) Chlorophyll pigments: to absorb light energy and convert it into chemical energy.

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NECO Biology Past Questions and Answers | Theory and Objectives –Download PDF.

NECO Biology Past Questions and Answers | Theory and Objectives –Download PDF. The National Examination Council of Nigeria (NECO) Examination is around the corner. This article provides the readers with the information on how to download NECO Biology Past Questions and Answers. NECO Biology Questions are essential for you to know if you want to pass the NECO SSCE Biology Exams 2023.

The NECO Biology past questions and answers is a compiled material in PDF that contains past questions from NECO Biology Exams of previous years. The material comes with answers and is easily downloadable.

You can download the materials here. The instructions on how to download the NECO Biology can be found below. You are expected to follow the instructions in order for you to succeed. The material does not only contain information on NECO Biology Questions and answers but how to pass exams as well. You can see this article on the 21 indispensable steps to pass any exams with high grade .

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NECO Biology Sample Questions and Answers

PAPER II [Essay] Answer any  FOUR  questions. Write your answers on the answer booklet provided.

1. (a) i. What is respiration? ii. In a tabular form, state four differences between gaseous exchange and aerobic respiration. (b) i. Explain the term residual air. ii. What is the importance of residual air to mammals? (c) State four characteristic features associated with respiratory structures. (d) i. What is oxygen debt? ii. Outline three activities that can result in oxygen debt.

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ANS:  a) b) (i) During breathing out/expiration/exhalation; not all the air is removed from the lungs; the air left inside the lungs during breathing out is residual air. (ii) air is left in the lungs so that the lungs do not collapse; air is always left inside the lungs so that more oxygen can be removed (diffuse) into the blood stream. (c) (d) i. The build up of lactic acid; during strenuous exercise is poisonous and makes the muscles ache; oxygen is needed to break down/get rid of the lactic acid; that is why athletes continue breathing heavily even after the exercise is over; the oxygen needed to get rid of the lactic acid is known as oxygen debt. ii. Running; boxing; swimming /any correct example of strenuous activities.

2. (a) (i) What is sexual reproduction? (ii) Name four organs in mammals that produce sex hormones. (iii) Name one sex hormone produced by each of the organs named in 2(a)(i). (b) In a tabular form outline three differences between reproductions in lizards and birds. (c) (i) How are identical twins forms in humans? (ii) State three characteristics features of identical twins.

3. (a) Define the term osmosis. (b) State two ways each in which osmosis is of importance to: (i) plants; (ii) animals. (c) A normal terrestrial plant was watered daily with a hypertonic solution for about seven (7) days. It was discovered that the plant was not doing well. Explain why. (d) (i)Explain briefly how marine organisms overcome the problem of high salinity in their environment? (ii) List four examples of organisms found in the benthic zone of a marine habitat.

4. (a)  (i) What is conservation? (ii) State six factors responsible for the decline of the abundance and variety of wildlife. (b) Outline six ways in which the government can improve the situation in 4(a) (ii) above. (c) (i) What is Eutrophication? (ii) State two causes of eutrophication.

5. (a) What is reproduction? (b) In a tabular form, state six differences between sexual reproduction and (c) asexual reproduction. (d) State three advantages sexual reproduction. (e) (i) Describe the female reproductive structure of a flowering plant. (ii) List two factors necessary for germination of seeds.

6. (a) (i) What is courtship behaviour? (ii) Outline five benefits derived by the exhibition of courtship behaviour. (b) Describe briefly courtship behavior in the Agama lizard. (c) Describe briefly the mammalian placenta.

7. (a) Explain briefly the role of the skin as a sensory organ. (b) Describe briefly the vegetation of Tropical Rain Forest. (c) List five animals that inhabit the Tropical Rain Forest.

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Tips on How to Pass NECO Examination 2023

If you want to Past the NECO Examination this year, you will need to follow the instructions below.

  • Practice daily with NECO Past Questions and Answers
  • Write out your subjects, the dates and time.
  • Engage in general revision few days to the examination and dwell more on the subjects you find difficult.
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NECO Biology Questions And Answers 2023 | Essay And Objectives

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This article reveals all you need to know NECO Biology Questions and Answers 2023 | Essay and Objectives. All NECO candidates for 2023 June/July SSCE should take every information contained in this post very serious.

I have specially prepared this article for the benefit of those who will be writing the 2023 June/July NECO examination. If you are sure that you would be sitting for this examination and biology is one of the subjects that you will be writing, pay close attention to all that you are going to see here.

There is good news for you!

Do wish to the complete NECO biology questions and answers before entering the examination venue/hall? If you have answered yes to this question, then you have to read this article to the end.

I have got EXPO for you on 2023 NECO Biology Questions and answers for Essay and Objectives. Do not leave this page if want to get detailed information about it.

Keep reading!

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NECO Biology Answers 2023 (EXPO)

Neco biology questions and answers for 2023 (essay and objectives), neco biology objective question for 2023, neco biology objective answers for 2023, neco biology theory questions for 2023 (essay), neco biology theory answers for 2023, more neco biology objective questions, neco biology objective answers to practice questions, related links:, read instructions, read carefully, take note of compulsory questions, start with the simplest, 5. attempt all the question, 6. review your answers, top 5 reasons for poor performance in neco biology examination.

1-10: DDEDBAEACC

11-20: DEECCBBBAB

21-30: EEADEAEAEA

31-40: BCCBCCBADE

41-50: DCCBCBECDC

51-60: EABBCCBADE

(i) Setting up of national park and gardens to save wildlife in their natural environment.

(ii) Poaching i.e. uncontrolled and illegal killing of game should be prevented.

(iii) Avoiding the use of pesticides that may kill off many animals

(vi) Prohibiting deforestation and encouraging afforestation

Sexual reproduction involves the fusion of two gametes – male and female gametes during fertilization to form a zygote which develops into a new organism. It involves organisms of the same species.

Sexual reproduction is the fusion or joining of male and female gametes or nuclei from different individual to form a zygote which later develops into an embryo or organism.

(i) biceps (flexor)

(ii) Triceps (extensor)

– When one touches a hot object, the sensory receptor in the skin receives the stimulus

– An impulse is transmitted from the receptor to the spinal cord, via the dorsal root/sensory neurone

– The intermediate neurone in the spinal cord passes on the impulse to the motor neurone

– The motor neurone then sends the impulses to an effector organ (muscle) via the ventral root

– All the neurones are linked by synapses across which impulses are sent

– The muscle upon receiving the impulse contracts causing the hand to be withdrawn from the hot object

(Pick Any Three)

(i) It provides water for photosynthesis

(ii) To get rid of excess water in the plant

(iii) It helps plants to continually draw water from the soil into their stem and leaves.

(iv) Some evaporation of water uses latent energy from plants and therefore keeps the plant cool

(v) It helps in the transport of mineral salts from soil to leaves and growing points of the plant

(i) Growing of cover crops like grasses, sweet potato which covers the surface of the soil

(ii) Contour ploughing: ploughing along the contours of a slope to reduce the speed of runoff water.

(NUMBER TWO)

Metamorphosis: This is the name given to the change in form shown by insects and amphibians from the egg stage to the adult stage.

(Pick Any Four)

(i) It regulate sex drive (libido)

(ii) It helps in the production of sperm

(iii) It helps in the production of red blood cells

(iv) It is responsible for muscle mass and strength

(v) Cause an increase in bone mass

(vi) Responsible for fat distribution

(i) It deaminates excess amino acid to urea

(ii) It stores iron from broken down cells

(iii) It detoxified poisonous substances and sent to the kidney for excretions

(iv) It supplies heat to the body by its metabolic reactions

(v) It also store fats and releases it at controlled rates into the blood when the need arises

(vi) It stores and releases minerals (iron, copper and potassium and vitamins (A, D and B12)

(i) Oxygen (only in the day)

(ii) Carbon dioxide (only at night)

(iii) Water

(iv) Tannins

(v) Alkaloids

(vi) Resins

(vii) Latex

– The semi-circular canals in the inner ear are responsible for the maintenance of balance with respect to circular motion.

– There are  three semi-circular canals and each is found in one of the geometrical planes (right angle to each other)

– During spinning, the gelatinous cupula in one of the semi-circular canals is set in motion.

– This stimulates the sensory hairs, and impulses are sent through the auditory nerves to the brain for proper body posture.

– When one stops spinning, the gelatinous cupula does not stop moving instantly but continues to move for some time

– This cause the continue feeling of the sensation of spinning

(i)Buccal respiration

(ii)Lung respiration

(iii)Skin respiration

TABULATE PLEASE

=WIND POLLINATED FLOWERS=

(i) The flowers are not attractive

(ii) The pollen grains are not sticky

=INSECT POLLINATED FLOWERS=

(i) The flowers are attractive

(ii) The pollen grains are sticky

(i)Parietal placentation.

(ii) Basal placentation.

Light rays from an external object is refracted by the cornea, aqueous humour, the lens and the vitreous humour. The lens act as the fine adjustment bringing the rays to a focus on the retina. The image formed on the retina of human are inverted and diminished. The brain receives the stimulus via the optic nerves and then interprete it.

(i)Parasitic nutrition

(ii)Symbiosis

(iii)Carnivorous nutrition

water cycle

(i) Internal fertilization

(ii) External fertilization

– After fertilization, the zygote divides repeatedly and develops into an embryo which consists of the plumule, radicle and one or two cotyledons.

– The primary endosperm nucleus develops into a nutritive tissue called endosperm, which stores food used by the developing embryo

– The synergids and the antipodal cells degenerate

– The ovule changes to form the seed and the interguments form the seed coat

– The micropyle remains where air and water enter the seed.

– The ovary develop into the fruit and the ovary wall forms the fruit wall called the pericarp.

– The style shrivels off, the petals, sepals and the stamens wither and fall off

(i) Red blood cells

(ii) White blood cells

(iii) Blood plasma

(iv) Platelets

(i)They are proteinous in nature

(ii) They speed up the rate of chemical reaction

(iii) They are organic catalyst

(iv) They are specific in function

Mendel’s first law also known as the law of segregation of genes states that during gamete formation, two alleles at a gene locus segregate from each other and each gamete has an equal probability of containing either allele

neco biology question paper

In this section, I will start by showing you all the questions that you should expect in your NECO biology objective questions for 2023.

Candidates should note that all the questions given in this section are predictions that are likely going to be true about NECO 2023.

Instructions

Each question is followed by FIVE options lettered A to E.

Find out the correct option for each question and shade in pencil in your answer sheet the answer space which bears the same letter as the option you have chosen.

Give only ONE answer to each question. An example is given below.

Which of these organisms is unicellular?

D. Paramecium

E. Spirogyra

The correct answer is ‘paramecium’ which is letter D, and therefore answer D would be shaded.

(A)               (B)               (C)               ( D )               (E)

Erase completely any answer you wish to change.

Do all your rough work on this paper.

1. Which of these organisms exhibit both plant and animal features?

2. Water vapour in the mesophyll layer reaches the atmosphere via the

A. guard cells.

B. lenticels.

C. micropyle.

D. mid rib.

3. Plants with succulent stems and root systems are leaves, sunken stomata and deep

A. epiphytes.

B. hydrophytes.

C. mesophytes.

D. pteridophytes.

E. xerophytes.

4. Which of the following classes of food is stored in the body as energy reserve?

A. Carbohydrates

B. Fats and oil

C. Mineral salts

D. Proteins

E. Vitamins

5. Which of these fruits sticks to the body of animals during dispersal?

B. Caryopsis

E. Schizocarp

See also: NECO Government Questions and Answers for 2023

6. Which of the following groups of organisms causes blackpod disease?

A. Bacteria

B. Bryophytes

C. Protozoans

7. The mouth parts of mosquito are adapted for

A. piercing and chewing.

B. cutting and sucking

C. biting and filtering.

D. biting and licking.

E. piercing and sucking.

8. In housefly, the pair of stump-like wings beneath the first pair of wings is called

A. elytron.

B. halteres

D. squamosa

9. Which of these is NOT an excretory product?

10. The change in colour of a chameleon is an adaptation for

A. feeding.

C. movement.

D. protection.

E. reproduction.

11. A flower made up of one carpel is referred to as

A. apocarpous.

B. monocarpous.

C. monogamous.

D. pericarpous.

E. syncarpous.

12. Which of these soil types plays the most important role in determining the healthy growth of a vegetation?

A. Clay soil

B. Laterite

C. Loamy soil

E. Sandy soil

13. During the inspiration process of breathing in man, which of the following events takes place?

A. Diaphragm becomes dome-shaped.

B. Intercostal muscles relax.

C. rib cage is lowered.

D. Sternum moves forward.

E. Volume of the thorax decreases.

14. Lungs and gills are used for respiration in

C. insects.

15. An association between two organisms where both members benefit is known as

A. commensalism.

B. Cretinism

C. mutualism

D. parasitism

E. saprophytism.

16. The anaerobic process of respiration occurs in the

A. cytoplasm

B. endoplasmic reticulum.

C. mitochondrion.

E. ribosomes.

17. Excessive thyroxine secretion causes

A. hyperactivity.

B. hypoactivity.

C. isoactivity.

D. metamorphosis.

E. sensitivity.

18. The male and female gametes of a flower are

A. stigma and anthers.

B. style and stigma.

C. pollen grains and ovules.

D. Ovary and anthers.

E. anthers and filaments.

19. Which of the following is absent in the mammalian male organ?

A. Epididymis

B. Sperm duct

20. Which of these best defines an association in which the host is harmed?

A. Commensalism

B. Mutualism

C. Parasitism

D. Saprophytism

E. Symbiosis

21. Volvox exists as a/an

22. Meiotic cell division results in the

A. growth of the cell.

B. production of chromosomes.

C. production of gametes.

D. production of two daughter cells.

E. repair of tissues.

plant flower

Use the above diagram to answer questions 23 and 24.

23. The fruit is formed from the part labelled?

24. What is the function of the part labelled I?

A. Develops into fruit

B. Grows into the pollen tube

C. Holds the flower

D. Produces the pollen grains

E. Receives pollen grains

25. The attachment of the embryo to the wall of the uterus is called

A. conception.

B. oogenesis.

C. fertilization.

D. implantation.

E. placentation.

egg

Use the diagram above to answer questions 26 and 27.

26. In which of the labelled parts does a developing embryo obtain its food.

27. The part labelled II in the diagram is called.

A. albumen.

28. Which of the following animals exhibits territoriality?

29. The study of living organisms in relation to their environment is called

A. cytology.

B. ecology.

C. haemotology.

D. mycology.

E. paleontology.

30. Which of the following is the correct sequence of a food chain?

A. Grass →Grasshopper →Toad →Snake →Hawk.

B. Grasshopper →Toad →Hawk →Grass →Snake.

C. Snake →Grass →Hawk →Grasshopper →Toad.

D. Hawk →Grass →Snake →Grasshopper →Toad.

E. Grass →Grasshopper →Toad →Hawk →Snake.

31. Which of these is a pathogen?

A. HIV virus

C. Small pox

32. A bone with large centrum, neural canal and long spine can be found around the

33. Which of these food sources is rich in carbohydrates?

B. Groundnuts

34. Which of these is a morphological variation?

A. Blood groups

B. Colour blindness

D. Tasting PTC

E. Tongue rolling

35. The condition in which light rays from near objects are brought to focus behind the retina is

B. hypermetropia.

C. presbyopia.

D. astigmatism.

E. accommodation.

36. The two digestive enzymes that work in an acid medium are

A. amylase and pepsin.

B. lipase and renin.

C. maltase and erepsin.

D. pepsin and renin.

E. trypsin and lipase.

euglena

Study the diagram above and use it to answer questions 37 and 38.

37. In the diagram above, the part labelled II is called

A. contractile vacuole.

B. cytoplasm

C. eyespot.

D. photoreceptor.

E. flagellum.

38. The function of the part labelled III in the diagram is to

A. absorb water from the surrounding.

B. control the activities of the cell.

C. manufacture food.

D. move the organism.

E. store waste products.

39. The part of the nervous system which controls voluntary actions is the

A. cerebellum.

B. cerebrum.

C. medulla oblongata.

D. spinal cord.

E. thalamus.

40. Which of these insects undergoes incomplete metamorphosis?

B. Butterfly

C. Cockroach

D. Housefly

E. Mosquito

41. Which of the following blood groups is a universal recipient?

42. A little food substance in a test tube plus millon’s reagent when heated, tests for the presence of

A. Fats and oil.

B. Simple sugars.

D. Mineral salts.

E. Protein.

43. A child produced from the mating between mother and son (as in goats) is an example of

A. asexual reproduction.

B. cross-breeding.

C. in breeding.

D. out breeding.

E. self-fertilization.

44. The hereditary material controlling a particular trait in organisms is called

A. centrosome.

B. chromatid.

C. chromosome.

E. lysosome.

45. Which of these causes competition in a habitat?

A. Abundance of food.

B. Drought and adverse weather

C. High photosynthetic activities

D. Increase in population

E. Moderate rainfall and temperature

46. Which of these methods is a modern way of food preservations?

C. Refrigeration

47. The association existing between tapeworm and man is

A. holozoic.

B. parasitic.

C. predatory.

D. saprophytic.

E. symbiotic.

48. Sex-linked traits are

A. carried by genes on sex chromosomes.

B. carried by genes on autosomes.

C. most often x-linked.

D. mostly transferred from mother to offspring.

E. often recessive in nature.

49. Which of the following defines a climax community?

A. A stable stage in the succession of organisms

B. A series of changes in the population of organisms

C. Highest attainable stage in species composition

D. A community that changes only when a habitat factor changes

E. The composition and size are the same over a long period of time

50. If a young couple is found to be carriers of baldhead trait, what is the probability that their first child would be baldheaded?

Use the diagram below to answer questions 51 and 52.

human reproductive system

51. Which of the following indicates the direction of movement of sperm introduced into the female reproductive organ.

A. II →I →IV →V

B. III →II →I →IV

C. VI →V →III →II

D. VI→IV →III →II

E. VI →IV →II →I

52. Where does fertilization take place?

53. Infertility in females may be as a result of

A. hairs on the body

B. lack of ovulation.

C. menstrual cycle.

D. narrow pelvis.

E. small breasts.

54. In which of the following parts of plants can auxins be found in highest concentration?

B. Lenticel

E. Shoot apex

55. Which of these animals possesses an exoskeleton?

A. Earthworm.

D. Starfish.

E Tapeworm.

56. The central nervous system is made up of which of the following pairs?

A. Brain and spinal cord.

B. Brain and nerves

C. Spinal cord and Sympathetic nervous system

D. Parasympathetic and sympathetic nervous systems.

E. Brain and Cerebrum

57. Which of the following is an autotrophic mode of nutrition?

A. Holozoic

B. Parasitic

C. Photosynthesis

D. Saprophytic

E. Symbiotic

58. For an organism to survive changes in its environment, it must

A. absorb more water.

B. adapt to the new conditions.

C. find shelter.

D. obtain more food.

E. obtain more light.

59. Which of these cell organelles is associated with energy generation?

A. Chloroplast

B. Endoplasmic reticulum

C. Golgi apparatus

D. Mitochondrion

E. Ribosome

60. In hypogeal germination, the

A. cotyledons are beneath the ground.

B. cotyledons are above the ground.

C. Epicotyl is beneath the ground.

D. Hypocotyl is above the ground.

E. Hypocotyl and cotyledons are above the ground.

The following are the answers to the objective question given in the previous section:

1B21B41E
2E22C42E
3E23C43C
4B24E44D
5B25E45D
6D26C46C
7E27C47E
8B28C48D
9A29B49E
10D30A50 
11B31A51 
12C32E52 
13D33D53 
14E34C54 
15C35B55 
16A36D56 
17A37C57 
18E38C58 
19D39A59 
20C40C60 

More of the answers to the objective question shall posted shortly. Keep checking this site for timely updates.

More Answers loading…

The following are the questions that you should expect in you NECO Biology theory questions for 2023 June/July examinations:

1a (1) State TWO agents of seed dispersal and give:

TWO examples of seeds and fruits dispersed by each. 6 marks

(ii) Name the TWO stages of photosynthesis. 2 marks

b (1) List the organs of taste and smell in man. 2 marks

(ii) Give Two ways in which genetics has contributed to the improvement of agriculture. 2 marks

c. Explain the role of the following in a food chain.

(i) carnivores.

(ii) decomposers.

(iii) herbivores.

(iv) producers.

2(a) i Make a labelled diagram (8-10cm) of the longitudinal section of the human eye. 10 marks

ii. Define trophic level

(b) State the functions of the following parts of the mammalian skin

(i) Erector muscle.

(ii) Sweat gland.

(c) List SIX evidences of evolution. 6 marks

3(a) i. What is a balanced diet? 2 marks

ii. List FOUR constituents of a balanced diet.

(b) i State the types of blood groups found in humans.

ii. List TWO sensations to which the taste buds respond.

(c) Discuss how the following factors affect population.

iii. Temperature

4(a) i. Define the term “Variation”

ii. By means of crosses, show how children inherit sickle cell anaemia from parents who are carriers. Use “S” to indicate normal gene and “s” to indicate sickle cell gene.

b. What ratio of the F1 generation would be

i. sicklers?

ii. carriers?

iii. normal?

(C) i. List FIVE importance of courtship behaviour in reproduction.

ii. State the first law of thermodynamics.

neco answer

(i) Two agents of seed dispersal:

Guava and mango – dispersed by animal

Cotton and Orchid – dispersed by wind

(ii) two stage of photosynthesis are:

Dark reaction

Light reaction

Organ of taste – Tongue

Organ of smell – Nose

(ii) Genetics has helped in the production of disease-resistant plants.

It has also contributed in the production of high-yielding crops and animals.

Roles of Carnivores in Food Chain

Carnivores play an important role in keeping ecosystem balanced. Predators keep population of prey species from becoming too large. Scavengers like vultures help to prevent diseases from spreading by eating the remains of dead animals.

Roles of Decomposers in Food Chain

Decomposers play a critical role in the flow energy through the food chain in an ecosystem. They break dead organisms apart into smaller inorganic materials. This process helps in making energy available to the producers (plants).

decomposer

Roles of Herbivores in Food Chain

In a food chain or an ecosystem, herbivores play important role in maintaining a healthy ecosystem. This is done by preventing an overgrowth of vegetation.

Also, many plants rely on the herbivores such as bees and butterfly to help them reproduce.

Roles of Producers in Food Chain

Producers, also known as Autotrophs, make their own food with the help of energy from the sun. they make up the first level of every food chain.

Autotrophs are usually plants or one-celled organisms. Nearly all autotrophs use a process called photosynthesis to create food (a nutrient called glucose) from sunlight, carbon dioxide and water.

Producers are the foundation of a food chain. They provide energy for all of the consumers in an ecosystem or food chain.

.i) Trophic level can be defined as the step by step in which energy and nutrients are transferred among organisms along a feeding pathway called food chain

human eyes

.i) Functions of Erector Muscles

The erector muscle is a tiny muscle connected to each hair follicle and the skin. When it contracts, it causes the hair to stand erect and Goosebumps forms on the skin.

mammalian skin

……………………………………………………………

Do wish to see more of the theory answers?

All you have to do is to keep visiting this page regularly as the complete answers to the question shall be uploaded as soon as possible.

Keep following this article to the end!

Answer all the questions.

Each question is followed by four options lettered A to D. Find out the correct option for each question and shade in pencil on your answer sheet, the answer space which bears the same letter as the option you have chosen. Give only one answer to each question. An example is given below.

Which part of the gill of fish is involved in gaseous exchange?

A. Gill slits

B. Gill bars

C. Gill covers

D. Gill filaments

The correct answer is Gill filaments, which is lettered D and therefore answer space D would be shaded.

[A]               [B]               [C]               [ D ]

Think carefully before you shade the answer spaces; erase completely any answer you wish to change.

Do all rough work on this question paper.

Now answer the following questions.

  • Which of the following organisms is not classified as an animal?

B. Paramecium

2. An organism that operates at the cellular level of organization, carries out its physiological activities by using its

A. cell membrane.

B. organelles.

C. small size.

D. cytoplasm.

3. The organelle which eliminates water from the body of a protozoan is the

A. plasma membrane.

B. contractile vacuole.

C. nucleus.

D. cell wall.

4. Which of the following cell types has the least number of mitochondria?

A. Cardiac cells of the heart

B Cells of the cornified layer

C. Muscle cells of the bladder

D. Muscle cells of the diaphragm

5. A typical plant cell is mainly distinguished from an animal cell by the possession of

A. chloroplast and nucleus.

B. cell wall and cytoplasm.

C. chloroplast and cell wall.

D. cell wall and mitochondrion.

6. Which of the following characteristics do fungi share in common with animals?”

A. Presence of digestive tract

B. Movement from one place to another.

C. Storage of carbohydrate as glycogen

D. Movement of centrioles during cell division

7. Which of the following processes involves diffusion?

A. Opening and closing of stomatal pores

B. Turgidity of herbaceous plants

C. Absorption of water through the root hairs

D. Absorption of digested food into the villi

8. The mechanism of opening and closing of stomata in plants is based on

A. turgidity and diffusion.

B. turgidity and flaccidity.

C. osmosis and diffusion.

D. diffusion and flaccidity.

9. In cellular respiration energy is made available to organisms by

A. removal of a phosphate group from ADP.

B. breaking off a phosphate group from ATP.

C. adding a phosphate group to glucose.

D. breaking off a hydrogen ion from NADPH.

10. Excretion in Paramecium sp . is by diffusion because

A. its habitat is water and moist places.

B. it has simple, small and few internal organs.

C. it has a large surface area to volume ratio.

D. it has a large efficient meganucleus.

11. The axial skeleton is composed of the

A. skull and vertebral column.

B. limbs and girdles.

C. atlas and axis.

D. radius and ulna.

12. The inorganic components of bone consist of

A. magnesium, sodium and calcium.

B. magnesium, phosphorus and calcium.

C. sodium, phosphorus and calcium.

D. potassium, magnesium and calcium.

13. A pulse is best described as

A. contraction of arteries to let out blood.

B. contraction of veins to allow blood into them.

C. dilation of arteries to accommodate blood rushing through.

D. pumping action of the heart to move blood round the body.

14. The following characteristics are associated with the mammalian lungs except

A. large surface area.

B. expandable lungs.

C. moist surface.

D. highly vascularized.

15. The excretory system in mammals consists of the following parts except

A. two kidneys.

B. two ureters.

C. two bladders.

D. one urethra.

16. The organ that receives reduced flow of blood during vigorous exercise is the

17. The car pinna is strengthened by

A. blood pressure.

B. cartilage.

D. turgor pressure.

18. The relationship between the retina and the brain is similar to that between the

A. cochlea and the auditory nerve.

B. cochlea and the brain.

C. cochlea and the semi-circular canals.

D. eardrum and the brain.

19. Which of the following statements about the development of the foetus is not correct?

A. The circulatory system of the foetus is directly connected to the maternal blood vessels.

B. The foetus depends on the mother’s blood for its food and oxygen. C. The foetus is surrounded by a water sac.

D. Food and oxygen are carried across the placenta to the embryo’s blood.

Use the diagram below to answer questions 20 and 21.

structure of egg

20. The parts that supply food and water to the developing embryo are labelled

A. I and II.

B. III and V.

C. V and VI.

D. II and III.

21. The part labelled III

D. air space.

22. Which of the following statements is true about transpiration? It is the

A. loss of water in the form of vapour from the surface of the leaf.

B. loss of water in the form of vapour from the surface of the root.

C. absorption of water in the form of vapour from the body of the plant.

D. movement of water through the body of the plant.

23. Transportation of water in the xylem tissue involves the following except

A. root pressure.

B. capillary action.

C. transpiration pull.

D. translocation.

24. The following are the major reasons why the butterfly lays eggs under the surface of a leaf except to

A. shade the eggs from the direct rays of the sun.

B. protect the eggs from predators.

C. protect the eggs from being washed away by rain drops.

D. camouflage the eggs.

25. In which of the following organic compounds is the hydrogen-oxygen ratio equal to 2:1?

A. Proteins

B. Carbohydrates

D. Vitamins

26. A man suffering from obesity must avoid meals containing.

A. margarine and butter.

B. rice and beans.

C. carrots and oranges.

D. beef and fish.

27. In testing for starch in a leaf, the leaf is first boiled in water for about a minute so that the

A. cell walls are hardened.

B. cells are killed.

C. chlorophyll is dissolved out.

D. iodine will penetrate.

28. Which of the following food substances is incorrectly linked to its enzyme?

A. Protein – trypsin

B. Fat – lipase

C. Sucrose – pepsin

D. Starch – amylase

29. Which of the following pH values is the best for the action of the enzymes – renin and pepsin in the stomach?

30. The bacterium in a mutualistic association with legumes converts

A. nitrates to ammonia.

B. ammonium compounds to nitrites.

C. nitrogen gas to ammonia.

D. nitrites to nitrates.

31. A herbivore cannot feed on a piece of meat because it has no

A. incisors to cut the meat.

B. canines to tear up the meat.

C. premolars to grind the meat.

D. molars to mash the meat.

32. In a particular habitat the role of an organism is referred to as its

B. biomass.

33. The distribution of organisms in a fresh water habitat like a stream or pond is determined by the following factors except

A. light penetration.

B. pH of the soil.

C. rainfall.

D. temperature.

34. The speed of wind is measured using the

A. wind vane.

B. anemometer.

C. photometer.

D. barometer.

35. Which of the following is a biotic component of an ecosystem?

B. Rainfall

36. A moss plant can withstand drought by means of its

B. rhizoids.

C. antheridia.

D. achegonia.

37. Which of the following factors is the main problem facing xerophytic plants?

A. Competition for sunlight

B. Conservation of excess water

C. Inadequate roots for water absorption

D. Lack of adequate water

38. The following are greenhouse gases except.

A. carbon dioxide.

B. chlorofluorocarbon.

C. methane.

39. Rural-urban migration in developing countries can be prevented by

A. increasing the number of years in school.

B. putting up more factories in urban areas.

C. having boarding schools in rural areas.

D. even distribution of facilities in both regions.

40. Muscles are attached to bones by means of

A. tendons.

B. ligaments.

C. cartilage.

41. In a population, food shortage may lead to

A. an increased survival rate.

B. high reproduction rate.

C. intra-specific competition.

D. low rate of migration

42. The following effects are associated with deforestation except

A. gully erosion.

B. extinction of plant species.

C. migration of wildlife.

D. increase in rainfall.

43. The main reason for the conservation of wildlife is to

A. create national parks for recreation

B. maintain ecological balance in communities.

C. prevent hunters from being cruel to animals.

D. save some species from extinction.

44. Which of the following is an example of variation?

B. Tongue rolling

C. Reproduction

45. The parameters of size, height, weight and colour in a population of living things are examples of

A. environmental variations.

B. non-heritable variations.

C. continuous variations.

D. discontinuous variations.

46. Fingerprints are useful in crime detection because

A. the police have sophisticated fingerprint machines.

B. thieves may leave their prints at the scene of a crime.

C. no two people have the same fingerprint.

D. fingerprints are easy to make.

47. A person with blood group O can be given blood from persons who have blood belonging to

A. group O only

B. group A only.

C. groups A and O.

D. groups A, B and O.

48. A man heterozygous for albino gene marries a woman who is also heterozygous for the gene. Both have normal skin colour. The probability that they will have an albino child is

49. Which of the following statements about heredity is not true? In heredity the traits are

A. carried by genes.

B. contained in the ovum and sperm.

C. always transmitted by one parent.

D. transmitted from parents to offspring.

50. An example of a saprophytic relationship is a/an

A. vulture feeding on decaying meat.

B. mushroom growing on decaying vegetation.

C. boy eating stale bread.

D. earthworm feeding on decaying vegetation.

51. In artificial selection, individuals without desirable traits may be prevented from mating by

A. outbreeding.

B. sterilization

C. inbreeding.

D. genetic engineering.

52. In a family of eight (8) all the children are girls. Which of the following reasons correctly explains this?

A. The woman cannot produce male children.

B. The man has a low sperm count.

C. The Y component of the man’s sex chromosome was always involved.

D. The X component of the man’s sex chromosome was always involved.

53. Which of the following statements is correct about the structure of a chromosome? A chromosome consists of

A. two chromatids joined at the centromere.

B. two chromatids joined at the spindle.

C. two chromatin threads joined at the centrioles.

D. thread-like structures not joined together.

54. Mr. Andrew, his wife and child belong to blood groups A, B and O respectively. The genotypes of both parents are

A. I A I O and I B I B

B. I A I A and I B I B

C. I A I B and I A I O

D. I A I O and I B I O

55. What would be the phenotypic ratio of the offspring of a cross between a heterozygous dominant parent and a double recessive parent?

56. The percentage probability that a normal male married to a carrier woman would have a haemophilic male child is

57. The importance of courtship in animals includes the following except

A. ensuring that the female chooses the right male species.

B. arousing both male and female partners.

C. protection of territory.

D. to coincide with the ovulation period and ensure fertilization.

58. In evolution, analogous structures are significant because they show

A. physiological diversity.

B. functional diversity.

C. genetic diversity.

D structural diversity.

59. Which of the following statements reflects the mechanism of natural selection?

A There are variations within every species

B. Individuals of every species are genetically identical

C. No organism in a species dies before sexual maturity

D. Organisms with selective advantages are less likely to survive

60. Which of the following animals exhibits territoriality?

B. Earthworm

See the answers to NECO Objective Questions below:

1D21B41C
2B22A42D
3B23D43D
4B24B44D
5C25D45C
6D26D46C
7D27D47A
8B28C48B
9B29A49C
10C30D50B
11A31B51B
12D32B52D
13D33B53A
14A34B54B
15D35D55C
16B36B56C
17B37A57B
18B38D58D
19A39D59A
20C40A60C

Hope you are still reading? Let’s keep going!

More NECO Biology Theory Questions

SECTION B ESSAY

[ 60 marks]

Instruction

Answer three questions in all: two questions in Part I and one question in either Part II or Part III. No marks will be awarded for answering questions not peculiar to your own country.

Large labelled diagrams should be used where they make an answer clearer. The names given for chosen species must be English or Scientific and not vernacular.

All questions carry equal marks.

Credit will be given for clarity of expression and orderly presentation of answers.

(a) Write the chemical equation for each of the following processes:

(i) aerobic respiration;

(ii) anaerobic respiration in plants;

(iii) anaerobic respiration in animals.

(b) State four functions which the liver of a patient suffering from cancer of the liver will not be able to perform.

(c) Make a diagram 8-10 cm long of a flame cell and label fully.

(d) Name one appropriate hormone each responsible for the following conditions in plants:

(i) ripening of fruits;

(ii) breaking dormancy in seeds;

(iii) weed control;

(iv) leaf fall.

2 (a) (i) Name two types of germination of seeds giving one example of each type.

(ii) Describe a simple experiment to demonstrate that oxygen, water and warmth are necessary for germination of seeds.

(b) State two distinguishing features each of

(i) epiphytes;

(ii) parasites.

(c) Give two examples of parasitic plants.

3. (a) Write short notes on each of the following:

(i) ecological niche;

(ii) population density

(iii) climax community.

(b) Describe briefly the interactions between abiotic and biotic components of an ecosystem. [8 marks]

4. (a) List four characteristics which can be genetically transmitted in humans. (b) (i) Name two sites each in plants and animals where meiosis occurs.

(ii) State two differences between meiosis and mitosis.

(c) A woman with blood group ‘A’ (heterozygous) claimed that her son who has blood group ‘O’ was fathered by Mr. James who has blood group ‘A’ (homozygous). With the aid of suitable genetic diagrams (i) prove or disprove the woman’s claim; 2

(ii) give reasons to support your answer.

5. (a) Explain the term metamorphosis.

(b) Give two examples each of insects that undergo:

(i) complete metamorphosis;

(ii) incomplete metamorphosis.

(c) (i) Name the different castes of termites.

(ii) State one function of each caste named in 5(c)(i) above.

(iii) State four ways in which termites are of economic importance to humans.

(iv) State two methods of controlling termites.

(a) State five factors to be considered when building a good house in the tropics.

(b) State: (i) five ways in which drinking water can be contaminated;

(ii) three diseases caused by contaminated water;

(iii) two qualities of water which is fit for drinking.

(c) Describe the process of administering first aid to a victim of snake bite.

Answer one question only from this part.

(i) What is placentation?

(ii) Name two organs associated with the human placenta.

(b) State five functions of the human placenta.

(c) Write short notes on the following:

(i) viviparity:

(ii) territoriality:

(iii) seasonal migration.

8. (a) Explain the term adaptation in relation to the mode of life of an organism.

(b) Explain how each of the following structures adapt the organisms that possess them to their modes of life:

(i) succulent leaves in Aloe sp .;

(ii) succulent stems and reduced leaves in cactus plants;

(iii) short, strong beaks in fowls;

(iv) counter shading in fish;

(v) tiny scale leaves on needle-like branches of pine trees.

(c) (i) What is population?

(ii) State five effects of overpopulation on a community.

Complete WAEC Mathematics Questions and Answers

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Complete WAEC Biology Questions And Answers For 2023 | Theory And Objectives

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2023 WAEC Biology Practical Specimen, Questions and Answers

How to Answer NECO Biology Questions

This section the article is for everyone and especially for all those candidates who are desperate to knowing the right thing to do in order to achieve excellent performance in NECO Biology examination.

The following are the special tips on how to answer NECO biology questions:

Once you have settled to take your examination in the examination hall, the next thing that you must do first is to read through the instructions on top of the page before you can proceed with reading the questions.

Most times, some instructions are specific to some questions, maybe one or two questions. Here, you still have to take those instructions very serious.

Before you can proceed to answering NECO biology questions, it is highly recommended that you read carefully to understand any question before you can start to answer the questions.

It is possible to see questions that would be similar to what you have been seeing before, probably in past questions, but they are not the same.

This is the point where it is very necessary that you meticulously go through the question before you answer, to avoid choosing the wrong option for objectives and giving wrong explanations for theory questions.

In every NECO examination, there is/are usually some questions that are specially made compulsory by the Nation Examination Council. These questions are always seen in the paper 2 which is theory aspect of it.

You must ensure that you are able to answer those compulsory questions before you can think of answering any other ones. The compulsory questions do carry special mark.

Just like any other examinations, the complexity of every question in NECO government examination varies. After you have gone through the questions, you would be able to tell which of the questions are simple and the ones that are difficult.

The best approach in such case requires that you answer the questions from the simplest to the most complex ones. This is important because it will help to cushion you against examination tension.

Not only that, it also helps in the management of your time. If you are finding any question difficult to answer, you have to leave it and go to the next. Thereafter, you can re-visit those questions that you have left unanswered.

Though it is advisable that you start answering your question from the simplest, leaving the more difficult ones at the first attempts, it does not imply that you should submit you examination without answering those ones you skipped.

It quite understandable that you may not know all the asked questions, you are still required choose your answers even the ones that you do not really know very well.

Sometime, your guess can fall in place and become the right answer. So always ensure that you attempt all you question before you submit.

After you have attempted the entire given questions, you still have to go through all the answers to check for any errors and possible corrections.

By going through the questions, you would be able to see any skipped question(s), if any and the ones you mistakenly clicked the wrong options.

Get more tips: How to Pass your NECO Examination at One Sitting

It is an error to assume that NECO biology examination is hard. Failure to perform excellently in NECO biology examination is a question of whether the candidate knows the right things to do and if he/she is doing it right.

The poor performance that have been seen in some candidates’ results over the years are as a result of poor application of the basic principles for writing NECO biology examination and some other factors that I am going to show you here.

Inadequate Preparation

This is the most important aspect of the reasons for poor performance in NECO biology that should be considered.

It is obtainable in all areas that when there is poor preparation for any examination they will be poor result. As a good student, you are required to prepare for the NECO biology examination to the point that you would be sure of scoring high.

Reading without Past Questions

During the preparation phase of NECO biology examination and any other subjects, it is very pertinent that candidates make use of past question papers with reference to their answers.

Failure to make use past questions and answers is one the reasons why many candidates are left in abeyance immediately they enter the examination halls for the biology examinations.

Due to the ignorance of the nature of the examination, they will not even know to answer and most time it will result to examination tension and probably fever for the students.

Poor Time Management

Time management is another important factor that can lead to poor performance in every examination. You should learn how to manage your time especially when you are in the examination hall.

The practice of time management starts from the period of the candidate’s preparation for the examination. Once you can answer your past questions comfortably with the limited time that will be provided, you will still manage your time very well on the examination date.

Lack of Adherence to Given Instructions

There are some students who are fond of ignoring instructions when come for examination. Jumping into answering of questions without reading the given instructions is very wrong. This contributes in a big way to poor performance in the examination.

If you want to have good performance in NECO Biology, you have to strictly pay close attention to any given instructions.

Submitting Incomplete Answers

When a candidate submits the examination without attempting all the questions, it will automatically affect his/her score. It is important you answer all the questions before your submission.

I hope that you have enjoyed the information contained in this article. For more assistance on NECO Biology Questions and Answers for 2023/2024 (Essay and Objectives), kindly make use of the comment section below this article.

Do not forget to share this article with your friends.

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Real NECO Biology Questions And Answers 2023 (Obj & Essay)

Real NECO Biology Questions And Answers 2023 : 2023 Get Free Live Biology (BIO) OBJ & Essay Questions and Answers for NECO June/July Free of charge | NECO June/July Questions and Answers for Free on Biology (Objectives and Theory) The EXPO Room (July 21, 2023).

June/July 2023 NECO Free biology essay and paper (BIO) question and answer answer 

Real NECO Biology Questions And Answers 2023 (Obj & Essay)

Friday, July 21, 2023, 10:00 a.m. to 12:30 p.m. Biology (Objective & Essay)

=====================================

2023 NECO BIOLOGY OBJ

1-10: BBEDACCAEE

11-20: DDCEABDAEC

21-30: EBBBEADBDD

31-40: EDACCCBCEA

41-50: EBBCACBAEC

51-60: DDABBDDDBE

COMPLEED!!!

====================

NECO 2023 BIOLOGY ESSAY

INSTRUCTION: Answer 3 Questions Only

The cell theory states that:

- All living organisms are made up of one or more cells.

- The cell is the basic unit of life.

- All cells arise from pre-existing cells.

- Robert Hooke, who discovered cells in 1665 and coined the term "cell".

- Matthias Schleiden and Theodor Schwann, who proposed the cell theory in 1839-1840.

- Large, brightly colored petals that attract insects.

- Nectar-producing glands to feed the insects.

- A strong, sweet fragrance to attract the insects.

- A landing platform for the insects to rest on.

- Pollen that is sticky and easily attaches to the insects.

- Ginger: Rhizome

- Banana: Rhizome

- Sweet potato: Tuber

- The mouth mechanically breaks down the bread by chewing and mixes it with saliva, which contains enzymes that begin breaking down the carbohydrates in the bread.

- The esophagus moves the food down to the stomach, where it is mixed with stomach acid and enzymes that further break down the bread.

- The small intestine absorbs the nutrients from the bread, such as carbohydrates, proteins, and fats, into the bloodstream.

- The large intestine absorbs water and electrolytes from the remaining food waste, forming feces.

- The rectum stores feces until they can be eliminated through the anus.

Amoeba ---> Hydra ---> Tilapia ---> Toad ---> Snake

(i) Small, lightweight seeds that can be easily carried by the wind.

(ii) Hairs or wings on the fruit that increase surface area and help to catch the wind.

(iii) A dry, papery fruit that splits open easily to release the seeds.

To determine if the shoot of a plant is positively phototropic.

=Apparatus:=

A potted plant, a light source, a ruler, a marker.

=Method/Procedure:=

(i) Place the plant in a dark room for 24 hours to ensure that it is not positively or negatively phototropic.

(ii) Place the light source at a fixed distance from the plant, with the light shining directly on the plant's shoot.

(iii) Turn on the light source and leave it on for 24 hours.

(iv) After 24 hours, measure the distance between the tip of the shoot and the light source.

(v) Mark the new position of the shoot tip on the ruler.

(vi) Repeat the experiment two more times, moving the light source to a different position each time.

=Observation:=

The shoot of the plant will grow towards them light source, bending in the direction of the light.

=Conclusion:=

The shoot of a plant is positively phototropic and grows towards a light source.

[ TABULATE ]

=Aerobic Respiration=

(i) Occurs in the presence of oxygen

(ii) Produces a large amount of ATP

(iii) Carbon dioxide and water are produced as waste products

=Anaerobic Respiration=

(i) Occurs in the absence of oxygen

(ii) Produces a small amount of ATP

(iii) Lactic acid or ethanol is produced as a waste product

=Complete Metamorphosis=

(i) Four distinct stages: egg, larva, pupa, adult.

(ii) Larva looks completely different from the adult.

=Incomplete Metamorphosis=

(i) Three stages: egg, nymph, adult.

(ii) Nymph looks similar to the adult, just smaller.

- Aim: To determine if chlorophyll is necessary for photosynthesis to take place.

- Apparatus: Two plants of the same species, one with leaves covered in aluminum foil, a light source, test tube, water, and a beaker.

- Method/procedure: Place one plant in a dark room and cover its leaves with aluminum foil. Place the other plant in front of a light source. After a few hours, pluck a leaf from each plant and place them in separate test tubes filled with water. Place the test tubes in a beaker and keep them in the dark.

- Observation: After a few hours, observe the test tubes to see which one has produced more oxygen bubbles.

- Conclusion: If the test tube with the leaf from the plant exposed to light produces more oxygen bubbles, then chlorophyll is necessary for photosynthesis to take place.

(i) Overuse of synthetic fertilizers

(ii) Overgrazing

(iii) Deforestation

(iv) Soil erosion

(i) Hearing loss

(ii) Sleep disturbance

(i) Crop diversity: Planting different crops in the same field over time to avoid the buildup of pests and diseases.

(ii) Soil health: Planting crops that have different nutrient requirements to maintain soil fertility and prevent soil erosion.

(iii) Pest management: Planting crops that are not susceptible to the same pests and diseases in succession.

(i) Reduced leaves or spines to minimize water loss through transpiration.

(ii) Thick cuticles and waxy coatings to reduce water loss through the epidermis.

(iii) Deep roots to tap into underground water sources.

(iv) CAM photosynthesis to reduce water loss during photosynthesis.

(v) Ability to enter dormancy during drought periods.

(i) Similarity in bone structure between birds and reptiles, especially in the skull and pelvis.

(ii) Presence of scales on bird feet and legs, which are also found in reptiles.

(iii) Similarity in egg-laying and incubation between birds and reptiles.

(i) Detoxification of harmful substances in the blood.

(ii) Production of bile to aid in digestion.

(iii) Storage of glycogen, vitamins, and minerals.

(iv) Regulation of blood glucose levels.

(v) Production of blood clotting factors.

(i) Reforestation: Planting new trees in areas where forests have been cleared or degraded.

(ii) Reduced impact logging: Using sustainable logging practices that minimize damage to the forest ecosystem.

(iii) Protected areas: Establishing and maintaining protected areas for wildlife and biodiversity conservation.

(iv) Community forestry: Encouraging local communities to manage forests sustainably for their own benefit and for the benefit of future generations.

==================

(i) Protection: the calyx protects the flower bud before it opens and the developing fruit after fertilization.

(ii) Support: the sepals of the calyx can provide support for the petals and reproductive structures.

(i) Insulin: regulates blood sugar levels.

(ii) Estrogen: regulates female reproductive system and secondary sexual characteristics.

(iii) Testosterone: regulates male reproductive system and secondary sexual characteristics.

(iv) Adrenaline: prepares the body for "fight or flight" response to stress.

(v) Melatonin: regulates sleep-wake cycles.

(i) Gene therapy: correcting genetic disorders by introducing functional genes into the patient's cells.

(ii) Predictive medicine: using genetic testing to identify individuals who are at risk for certain diseases and develop personalized prevention or treatment plans.

(i) Large surface area: to maximize light absorption.

(ii) Thin and flat shape: to reduce the distance that light needs to penetrate into the leaf.

(iii) Chlorophyll pigments: to absorb light energy and convert it into chemical energy.

COMPLETED!!!

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Neco 2024 Biology Objective & Essay Answer (June/July Exam)

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Tuesday, 2nd July 2024 Biology (Objective & Essay) 2:00pm – 4:30pm

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BIOLOGY OBJ! 01-10: EEDDDEEAAE 11-20: DABBCAEEBD 21-30: ACECCDADED 31-40: DDBEBAEDBA 41-50: BACABABDDE 51-60: ECDCDCCADA Use this obj, some corrections is being made =============================================

BIOLOGY ESSAY ANSWERS (1ai) (i) Producers (plants, algae) (ii) Consumers (animals, insects) (iii) Decomposers (bacteria, fungi)

(1aii) (i) Mandibles (jaws) (ii) Maxillae (maxilla) (iii) Labium (lower lip)

(1bi) (i) Blood enters the glomerulus under high pressure, causing water, salts, glucose, and waste products to filter out of the blood into Bowman’s capsule, forming a filtrate. (ii) As the filtrate moves through the proximal convoluted tubule, loop of Henle, and distal convoluted tubule, essential substances like glucose, certain ions, and water are reabsorbed back into the blood. (iii) Additional waste products and excess ions are secreted from the blood into the tubular fluid. The final product, urine, moves from the collecting ducts into the renal pelvis, down the ureters, and into the bladder for storage before excretion.

(1bii) (i) Malleus (hammer) (ii) Incus (anvil)

(1biii) [TABULATE]

=PHOTOSYNTHESIS= (i) Converts light energy into chemical energy stored in glucose. (ii) Produces oxygen as a by-product

=RESPIRATION= (i) Converts chemical energy in glucose into usable energy (ATP). (ii) Produces carbon dioxide as a by-product =============================================

(2ai) (i) Wings (modified forelimbs) (ii) Hollow bones (reduced weight) (iii) Lightweight skeleton (reduced weight) (iv) Powerful muscles (for wing movement)

(2aii) -Pollen from anther (male part) is transferred to stigma (female part) -Pollination occurs through agents like bees, butterflies, wind, or water -Fertilization occurs when pollen germinates and sperm reaches the egg -Seed formation and fruit development follow successful pollination

(2bi) (i) Long, sticky tongue (for catching prey) (ii) Specialized teeth (for holding onto prey) (iii) Webbed feet (for movement and hunting)

(2bii) [TABULATE]

=ARTERIES= (i) Carry blood away from the heart (ii) No valves (except for the pulmonary artery and aorta) (iii) Narrower lumen compared to veins (iv) Thick, muscular, and elastic walls

=VEINS= (i) Carry blood towards the heart (ii) Valves present to prevent backflow of blood (iii) Wider lumen compared to arteries (iv) Thinner, less muscular, and less elastic walls =============================================

(3ai) (i) Phototropism (growth towards light) (ii) Geotropism (growth towards gravity) (iii) Hydrotropism (growth towards water) (iv) Thigmotropism (growth towards touch)

(3aii) (i) Loss of fertile land and decreased agricultural productivity (ii) Increased sedimentation in water bodies, harming aquatic ecosystems

(3bi) Grass=>Grasshopper=>Lizard=>Hawk

Neco 2024 Biology Objective & Essay Answer (June/July Exam)

(3biii) (i) Oxygen (O?) (ii) Glucose (C?H??O?) =============================================

(4ai) (i) Humerus (ii) Radius (iii) Ulna

Neco 2024 Biology Objective & Essay Answer (June/July Exam)

(4bi) (i) Insulin (regulates blood sugar levels) (ii) Adrenaline (responds to stress) (iii) Growth Hormone (regulates growth and development)

(4bii) -Amoeba: Contractile vacuole -Hydra: Diffusion through body surface -Earthworm: Nephridia -Grasshopper: Malpighian tubules

(4biii) (1) Mitochondria: Generates energy for the cell through cellular respiration (2) Lysosomes: Contains digestive enzymes to break down and recycle cellular waste and foreign substances =============================================

Neco 2024 Biology Objective & Essay Answer (June/July Exam)

(5bi) [TABULATE]

=MONOCOT PLANTS= (i) Leaf Venation; Parallel venation (ii) Number of Flower Parts; Usually in multiples of three

=MONOCOT PLANTS= (i) Leaf Venation; Reticulate (net-like) venation (ii) Number of Flower Parts; Usually in multiples of four or five

(5bii) (i) Fossil Record: Shows changes in species over time, with transitional forms demonstrating common ancestry. (ii) Comparative Anatomy: Homologous structures (e.g., limb bones in vertebrates ) indicate common ancestry. (iii) Molecular Biology: DNA and protein sequence similarities among different species suggest evolutionary relationships. (iv) Biogeography: Distribution of species across different geographical areas supports patterns of evolution and migration.

(5biii) (i) Hinge Joint (ii) Ball-and-Socket Joint (iii) Pivot Joint COMPLETED

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NECO Biology Questions & Answer 2023 Released.

The Neco biology 2023 answers are now available. The National Examination Council (NECO), Senior School Certificate Examination (SSCE) Biology paper will be written on Friday 21st July 2023.

The Neco biology exam will comprise Papers III & II: Objective & Essay which will commence at 10.00 am to end at 12.30 pm. That means the examination will last for two hours thirty minutes (2hrs 30mins) only.

In this post, we will be posting samples of the neco biology questions for candidates that will participate in the examination for practice purposes.

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Note that below is the questions from Neco past questions and answers that we feel are likely questions for GCE preparation.

Neco Biology Essay Questions 2023.

Section II [Theory]: Answer any four questions from this section. Each question carries 10 marks. Write your answers in the answer booklet.

1. (a) (i) State two main functions of roots. (ii) Make a drawing 8-10cm long of the transverse section of the stem of a dicotyledonous plant and label fully. (b) In a tabular form, state three differences between the functions of vascular tissues of plants and the skeleton of mammals. (c) State: (i) two functions of xylem tissues; (ii) one function of phloem tissues. (d) What is meant by the term tropism?

2. (a) What is reproduction? (b) In a tabular form, state six differences between sexual reproduction and (c) asexual reproduction. (d) State three advantages of sexual reproduction. (e) (i) Describe the female reproductive structure of a flowering plant. (ii) List two factors necessary for the germination of seeds.

3. (a) (i) What is pollution? (ii) Name three water pollutants. (iii) State five harmful effects of sulfur dioxide in the atmosphere. (b) (i) Explain the term population. (ii) Explain how a pitfall trap is used to measure the population size of organisms in a habitat.

4. (a) In a garden, it was observed that the leaves of some vegetables were molting and had turned yellow, purple, and orange. There was stunted growth of mostly the lower leaves and the vegetables possessed a weak stem. List the elements likely to be deficient in the garden soil. (b) State three methods that can be adopted by a farmer to improve soil fertility for improved yield. (c) State four similarities and four differences between the alimentary canal of a bird and a cockroach. (d) List four disorders of the alimentary canal of humans.

5. (a) (i) Bacteria reproduce asexually by dividing in two. What term is used for this form of asexual reproduction? (ii) What do bacteria form when environmental conditions become unfavourable? (iii) What does the term pathogenic mean in relation to bacteria? (b) (i) Name an organ in the human body, other than the kidney, in which excretion takes place. (ii) In which part of the flower is pollen produced? (iii) In which part of a flower does a seed form? (c) Name another member of the kingdom to which Rhizopus belongs, other than yeast, and explain how it is of benefit to humans.

6. (a) (i) What is courtship behaviour? (ii) Outline five benefits derived from the exhibition of courtship behaviour. (b) Describe briefly courtship behavior in the Agama lizard. (c) Describe briefly the mammalian placenta.

7. (a) Explain briefly the role of the skin as a sensory organ. (b) Describe briefly the vegetation of Tropical Rain Forest. (c) List five animals that inhabit the Tropical Rain Forest.

Neco Biology Objective Questions.

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2023 Neco Biology Essay and Objective Questions and Answers

The National Examination Council (NECO) Has Scheduled The 2023 Neco Biology Essay and Objective Questions and Answers Paper To Kick of on Friday 21st July 2023.

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NECO Biology Essay Questions 2023

3a. (i) List two examples of fresh water habitat

3a. (ii) In a tabular form, state two differences between complete and incomplete metamorphosis.

3b. Describe an experiment to show that chlorophyll is necessary for photosynthesis to take place under the following headings:

Aim Apparatus

Method/procedure

Observation

3c. (i) State four harmful practices that deplete soil fertility.

3c. (ii) Enumerate two effects of noise pollution.

4a. (i) State three principles to be observed in a crop rotation system.

4a. (ii) List five adaptive features of xerophytes.

4b. (i) Enumerate three evidence of convergent evolution to show that birds might have descended from reptilian ancestors.

4b. (ii) List five function of the liver.

4c. Give four methods of conserving forest resources

5a. A pure breed of dominant white coloured rabbit (WW) was crossed with a pure breed of recessive black coloured rabbit (ww). By means of crossing, show the genotypic and phenotypic ratios of F1and F2 generations.

5b. (i) State two functions of calyx in plant.

5b. (ii) Name five animal hormones.

5c. (i) Give three structural adaptations of leaves for photosynthesis.

5c. (ii) Enumerate two ways in which the principles of heredity has contributed to the field of medicine.

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NECO (Biology) Answer Obj & Essay – June/July Runz

NECO 2023 Biology Expo Answer

The 2023 NECO Biology (Obj & Essay) Solution Expo Questions and Answers have indeed been long expected and much anticipated. While the official body to conduct the 2023 Senior School Certificate Examination which is the National Examination Council was originally slated for June/July, but due to some reasons best known to the body, it is now scheduled for July/August

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2024 NECO BIOLOGY: 2024 NECO Biology (Objective & Essay) Questions and Answers (1262)

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Welcome to official 2024 Biology NECO answer page. We provide 2024 Biology NECO Questions and Answers on Essay, Theory, OBJ midnight before the exam, this is verified & correct NECO Bio Expo. NECO Biology Questions and Answers 2024. NECO Bio Expo for Theory & Objective (OBJ) PDF: verified & correct expo Solved Solutions, 2024 NECO Biology (Objective & Essay) Questions and Answers. 2024 NECO EXAM Biology Questions and Answers

CLICK HERE TO VIEW ANSWER No. 1 on Biology

(1ai) (i) Setting up of national park and gardens to save wildlife in their natural environment. (ii) Poaching i.e. uncontrolled and illegal killing of game should be prevented. (iii) Avoiding the use of pesticides that may kill off many animals (vi) Prohibiting deforestation and encouraging afforestation (1aii) Sexual reproduction involves the fusion of two gametes male and female gametes during fertilization to form a zygote which develops into a new organism. It involves organisms of the same species. (1aiii) (i) biceps (flexor) (ii) Triceps (extensor) (1b) (i) When one touches a hot object, the sensory receptor in the skin receives the stimulus (ii) An impulse is transmitted from the receptor to the spinal cord, via the dorsal root/sensory neurone (iii) The intermediate neurone in the spinal cord passes on the impulse to the motor neurone (iv) The motor neurone then sends the impulses to an effector organ (muscle) via the ventral root (v) All the neurones are linked by synapses across which impulses are sent (vi) The muscle upon receiving the impulse contracts causing the hand to be withdrawn from the hot object (1ci) (i) It provides water for photosynthesis (ii) To get rid of excess water in the plant (iii) It helps plants to continually draw water from the soil into their stem and leaves. (1cii) (i) Growing of cover crops like grasses, sweet potato which covers the surface of the 'copied from e x a m p l a z a . c o m free' soil (ii) Contour ploughing: ploughing along the contours of a slope to reduce the speed of runoff water.

CLICK HERE TO VIEW ANSWER No. 2 on Biology

(2ai) Metamorphosis can be defined as the change of form or structure in an organism after hatching or birth. (2aii) (i) Promotion of sperm production (ii) Aids development of uterine wall (iii) Stimulates growth of testis (iv) Promote development of secondary sexual characters in male (2aiii) (i) Production of bile (ii) Detoxification (iii) Deamination (iv) Source of vitamin (2bi) (i)Oxygen (ii)Acids (iii)Tannins (2bii) When a man spins around a tree several time, there is an increase in metabolism leading to use up of energy. This as a result leads to decrease in energy and in turn causes dizziness

CLICK HERE TO VIEW ANSWER No. 3 on Biology

(3ai) (i)Buccal respiration (ii)Lung respiration (iii)Skin respiration (3aii) TABULATE PLEASE =WIND POLLINATED FLOWERS= (i) The flowers are not attractive (ii) The pollen grains are not sticky =INSECT POLLINATED FLOWERS= (i) The flowers are attractive (ii) The pollen grains are sticky (3aiii) (i)Parietal placentation. (ii) Basal placentation. (3bi) Light rays from an external object is refracted by the cornea, aqueous humour, the lens and the vitreous humour. The lens act as the fine adjustment bringing the rays to a focus on the retina. The image formed on the retina of human are inverted and diminished. The brain receives the stimulus via the optic nerves and then interprete it. (3bii) (i)Parasitic nutrition (ii)Symbiosis (iii)Carnivorous nutrition

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(4aii) (i)Internal fertilization (ii)External fertilization (4bi) Fruits is a product of fertilization in flowering plants. When a grain of pollen tube for the sperm to journey down the style and fertilize the ovule. The fertilized ovules become seeds. Fertilization is the death of the flower, as the petals drop or wither at this point and the ovary starts to enlarge and ripen into what we known as fruit (4bii) (i)plasma (ii)red blood cells (iii)white blood cells (iv)platelets

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(5ai) (i)They are proteinous in nature (ii) They speed up the rate of chemical reaction (iii) They are organic catalyst (iv) They are specific in function (5aii) Mendel's first law also known as the law of segregation of genes states that during gamete formation, two alleles at a gene locus segregate from each other and each gamete has an equal probability of containing either allele (5aiii)

2024 NECO Biology (Objective & Essay) Questions and Answers 2024 NECO BIOLOGY: 2024 NECO Biology (Objective & Essay) Questions and Answers (1262) Welcome to official 2024 Biology NECO answer page. We provide 2024 Biology NECO Questions and Answers on Essay, Theory, OBJ midnight before the exam, this is verified & correct NECO Bio Expo

(5bi) (i)Bush burning (ii)Overcropping (iii)Overgrazing (5bii) (i)Seasonal migration (ii)Pairing (iii)Territoriality

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NECO 2024 Biology OBJ & ESSAY Questions and Answers

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2024 NECO BIOLOGY (OBJECTIVES) QUESTIONS AND ANSWERS:

2024 neco biology (essay) questions and answers:.

BIOLOGY ESSAY

(1ai) (i) Producers (ii) Consumers (iii) Decomposers

(1aii) (i) Mandibles (ii) Maxillae (iii) Labium

(1bi) (i) Filtration: Blood enters the glomerulus through the afferent arteriole and is filtered under pressure in the Bowman’s capsule, removing water, ions, glucose, amino acids, and waste products like urea from the blood. (ii) Reabsorption: As the filtrate moves through the proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct, essential substances such as water, glucose, and ions are reabsorbed back into the bloodstream. (iii) Secretion: Additional waste products and excess ions are secreted into the tubule from the surrounding capillaries, ensuring the removal of substances not initially filtered or those that need to be regulated. The final product, urine, collects in the renal pelvis, flows through the ureters to the bladder, and is excreted via the urethra.

(1bii) (i) Malleus (Hammer) (ii) Incus (Anvil)

(1biii) PHOTOSYNTHESIS -Converts carbon dioxide and water into glucose and oxygen using sunlight -Only occurs in the presence of light (daytime)

RESPIRATION -Converts glucose and oxygen into carbon dioxide, water, and energy (ATP) -Occurs continuously, day and night

====================

(2ai) (i) Wings (ii) Hollow bones (iii) Lightweight skeleton (iv) Powerful muscles

(2aii) -Pollen from anther (male part) is transferred to stigma (female part) -Pollination occurs through agents like bees, butterflies, wind, or water -Fertilization occurs when pollen germinates and sperm reaches the egg -Seed formation and fruit development follow successful pollination

(2bi) (i) Sticky tongue (ii) Specialized teeth (iii) Webbed feet

(2bii) [TABULATE]

=ARTERIES= (i) Carry blood away from the heart (ii) No valves (except for the pulmonary artery and aorta) (iii) Narrower lumen compared to veins (iv) Thick, muscular, and elastic walls

=VEINS= (i) Carry blood towards the heart (ii) Valves present to prevent backflow of blood (iii) Wider lumen compared to arteries (iv) Thinner, less muscular, and less elastic walls

(3ai) (i) Phototropism (ii) Geotropism (iii) Hydrotropism (iv) Thigmotropism

(3aii) (i) Loss of fertile land and decreased agricultural productivity (ii) Increased sedimentation in water bodies, harming aquatic ecosystems

(3bi) Grass>Grasshopper>Lizard>Hawk

(3bii) Diagram below 👇

neco biology obj and essay 2023 questions and answers

(3biii) (i) Oxygen (O₂) (ii) Glucose (C₆H₁₂O₆)

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June/July NECO Commerce Questions 2024 Free Answers (Essay & Obj) 100% Verified Solution

All NECO 2024 Commerce essay and OBJ answers is fully released. All students can now, see 2024 NECO Commerce Questions June/July, and how to pass the exam without stress. Friday 26th July, 2024 is the date scheduled for the examination. The National Examinations Council (NECO) is a Nigerian examination body responsible for conducting and administering national examinations at the secondary school level. NECO plays a crucial role in assessing and certifying students’ academic achievements across various subjects.

NECO Commerce exam assesses students’ understanding of business principles, including finance, marketing, and entrepreneurship. It is a crucial subject for students pursuing careers in business management, economics, or related fields.

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COMMERCE OBJ 1-10: BBDCBEACCC 11-20: DBEEEEBBCB 21-30: EAAAEBDBDB 31-40: DCCAACCABB 41-50: CADDBADDBC 51-60: ACBDBAEBBB COMMERCE-ESSAY ANSWERS (1a) Commerce refers to the exchange of goods, services, and ideas between businesses, organizations, and individuals, often involving the buying and selling of products, as well as the provision of services.

(1b) (i) Buying and Selling: Commerce facilitates the exchange of goods and services between producers and consumers, enabling businesses to purchase raw materials, goods, and services, and sell their products to customers.

(ii) Transportation and Storage: Commerce involves the movement of goods from one place to another, ensuring that products reach their intended destinations. Storage facilities also play a crucial role in holding goods until they are needed.

(iii) Finance and Banking: Commerce relies on financial systems, including banks, to facilitate transactions, provide credit, and manage risk. This function enables businesses to access capital, manage cash flow, and invest in growth.

(iv) Marketing and Advertising: Commerce involves promoting products and services to potential customers, creating awareness, and stimulating demand. Effective marketing and advertising help businesses reach their target audience and drive sales. (2a) International Trade refers to the exchange of goods and services between different countries, involving the import and export of products across international borders.

(2b) =MAIN DIVISIONS OF HOME TRADE= (i) Wholesale Trade: Involves the sale of goods in large quantities to retailers or other intermediaries. (ii) Retail Trade: Involves the sale of goods directly to consumers in small quantities.

=DIVISIONS OF FOREIGN TRADE= (i) Import Trade: Involves the purchase of goods from foreign countries for sale in the domestic market. (ii) Export Trade: Involves the sale of domestically produced goods to foreign countries.

(2c) (i) Geographic Area: Home trade operates within a country’s borders, while foreign trade involves international transactions.

(ii) Currency: Home trade uses the local currency, while foreign trade involves exchanging currencies.

(iii) Language and Culture: Home trade involves a common language and culture, while foreign trade requires understanding different languages and cultural nuances.

(iv) Regulations: Home trade is subject to domestic laws and regulations, while foreign trade must comply with international laws, tariffs, and trade agreements.

(v) Transportation: Home trade typically involves shorter transportation distances, while foreign trade requires longer distances and more complex logistics.

(vi) Risk: Foreign trade involves higher risks due to factors like political instability, exchange rate fluctuations, and trade restrictions.

(3) (i) Market Demand: Understanding the demand for your product or service is crucial. Identify your target audience, their needs, and preferences. Ensure there’s a sufficient market for your offering.

(ii) Financial Resources: Starting a small business requires capital. Determine your startup costs, funding options, and revenue projections. Consider your financial situation, funding sources, and cash flow management.

(iii) Business Structure: Decide on a business structure (sole proprietorship, partnership, LLC, corporation) that suits your needs. Consider factors like liability, taxation, ownership, and control.

(iv) Marketing Strategy: Develop a marketing plan to reach your target audience. Consider factors like branding, advertising, sales tactics, and customer service. Identify your unique selling proposition (USP) and competitive advantage.

(v) Operational Planning: Plan your business operations, including production, logistics, supply chain management, and human resources. Consider factors like location, equipment, staffing, and workflow efficiency.

(4a) An entrepreneur is an individual who creates, organizes, and manages a business or enterprise, often with the goal of earning a profit. They are typically characterized by their willingness to take risks, innovate, and adapt to changing circumstances.

(4b) (i) Risk-Taking: Entrepreneurs assume financial, operational, and reputational risks to start and grow their businesses. They invest their time, money, and resources, often with uncertain outcomes.

(ii) Innovation: Entrepreneurs develop new products, services, or processes to meet customer needs or improve existing offerings. They innovate to differentiate themselves from competitors and stay ahead in the market.

(iii) Resource Allocation: Entrepreneurs manage resources (human, financial, material) efficiently to achieve business objectives. They allocate resources to optimize production, marketing, and other business activities.

(iv) Leadership and Management: Entrepreneurs lead and manage their teams, making strategic decisions, setting goals, and motivating employees to achieve business success. They foster a positive company culture, build relationships with stakeholders, and adapt to changing circumstances.

(5) (i) Capital: The total amount of money invested in a business to start or expand its operations. It can come from various sources, such as shareholders, loans, or retained earnings.

(ii) Profit: The financial gain or surplus earned by a business after deducting total expenses from total revenue. It’s the reward for entrepreneurship and risk-taking.

(iii) Authorised Capital (Nominal Capital): The maximum amount of capital a company is allowed to raise, as specified in its Memorandum of Association. It’s the upper limit of capital a company can issue.

(iv) Issued Capital: The portion of authorised capital that a company has actually issued to shareholders in exchange for cash or other considerations. It represents the amount of capital raised from shareholders.

(v) Called-up Capital: The portion of issued capital that a company has actually received from shareholders. It’s the amount of capital paid by shareholders, which can be less than the issued capital if not all shares are fully paid up. (7a) Business environment refers to the internal and external factors that affect a company’s operations, decisions, and performance. It encompasses various elements that influence the business, including economic, social, political, technological, and natural factors.

(7b) (i) Economic Environment: Refers to the economic conditions and trends that impact business, such as inflation, interest rates, unemployment, and GDP growth. This environment affects demand, supply, and pricing.

(ii) Social Environment: Encompasses demographic, cultural, and social factors that influence consumer behavior and preferences. This includes population growth, age distribution, lifestyle changes, and social values.

(iii) Political Environment: Comprises government policies, laws, regulations, and political stability that affect business operations. This includes taxation, trade policies, labor laws, and environmental regulations.

(iv) Technological Environment: Refers to the current state and future developments in technology that impact business, such as advancements in IT, automation, and innovation. This environment influences product development, process efficiency, and competitive advantage. (8a) A Certificate of Incorporation is a legal document issued by a government agency, typically the Registrar of Companies, to confirm the registration and existence of a company. It serves as proof that the company has been duly incorporated and is authorized to operate.

(8b) (i) Separate Legal Entity: Both public and private limited companies have a separate legal identity from their shareholders. (ii) Limited Liability: Shareholders’ liability is limited to the amount of their share capital. (iii) Perpetual Succession: Both types of companies have perpetual succession, meaning they can continue to exist even if shareholders change. (iv) Ability to Sue and be Sued: Both public and private limited companies can sue and be sued in their own name.

: (8c) (i) Separate Legal Entity: A limited company has its own distinct legal identity. (ii) Limited Liability: Shareholders’ personal assets are protected in case of business debts or liabilities. (iii) Perpetual Succession: The company can continue to exist even if shareholders change. (iv) Ability to Sue and be Sued: The company can take legal action and be held liable. (v) Transferability of Shares: Shares can be easily transferred, allowing for changes in ownership. (vi) Capacity to Enter Contracts: The company can enter contracts and agreements in its own name.

(9) (i) Marketing: The process of identifying and satisfying customer needs, wants, and preferences through creating, communicating, and delivering value to customers. It involves understanding target audiences, developing marketing strategies, and building brand awareness.

(ii) Price: The amount of money charged for a product or service. Pricing decisions consider factors like production costs, competition, demand, and target audience willingness to pay. Effective pricing balances revenue goals with customer affordability and perceived value.

(iii) Promotion: The communication and persuasion efforts used to inform, persuade, and influence target audiences about a product, service, or brand. Promotion includes advertising, sales promotions, public relations, personal selling, and digital marketing.

(iv) Product: A tangible or intangible offering that meets customer needs, wants, or preferences. Products can be goods, services, experiences, or ideas. Effective product development considers factors like quality, features, design, and branding.

(v) Transportation: The movement of goods, products, or supplies from one place to another. In a business context, transportation involves managing logistics, supply chains, and distribution channels to ensure timely, efficient, and cost-effective delivery of products to customers.

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Tips For passing NECO Commerce exam

To pass the NECO Commerce exam, focus on understanding core concepts such as business operations, marketing strategies, and financial management rather than rote memorization. Regularly practice past questions and seek clarification on challenging topics to build confidence and improve your exam performance

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Biology-Obj 01-10: EEDDDEEAAE 11-20: DABBCACEBD 21-30: BCECCDADAD 31-40: DDBEBAEDBC 41-50: BACABABDDE 51-60: ACDCDCCDDA

Number 1-5 Has Been Answered For You

(1ai) (i) Producers (ii) Consumers (iii) Decomposers

(1aii) (i) Mandibles (ii) Maxillae (iii) Labium

(1bi) (i) Filtration: Blood enters the glomerulus through the afferent arteriole and is filtered under pressure in the Bowman’s capsule, removing water, ions, glucose, amino acids, and waste products like urea from the blood. (ii) Reabsorption: As the filtrate moves through the proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct, essential substances such as water, glucose, and ions are reabsorbed back into the bloodstream. (iii) Secretion: Additional waste products and excess ions are secreted into the tubule from the surrounding capillaries, ensuring the removal of substances not initially filtered or those that need to be regulated. The final product, urine, collects in the renal pelvis, flows through the ureters to the bladder, and is excreted via the urethra.

(1bii) (i) Malleus (Hammer) (ii) Incus (Anvil)

(1biii) PHOTOSYNTHESIS -Converts carbon dioxide and water into glucose and oxygen using sunlight -Only occurs in the presence of light (daytime)

RESPIRATION -Converts glucose and oxygen into carbon dioxide, water, and energy (ATP) -Occurs continuously, day and night

====================================

(2ai) (i) Lightweight skeleton (ii) Feathers (iii) Powerful muscles (iv) Streamlined body

(2aii) Pollination is the process where pollen from the anther (male part) of a flower is transferred to the stigma (female part). This can happen through wind, water, or animals like bees. Once on the stigma, the pollen grain grows a tube down to the ovary, allowing the sperm to fertilize the ovules, leading to seed formation.

(2bi) (i) Sticky Tongue (ii) Camouflaged Skin (iii) Sharp Vision:

(2bii) = TABULATE =

= ARTERIES = (i) Carry oxygenated blood away from the heart to the body tissues (ii) Thick walls with three layers: tunica intima, tunica media (muscular and elastic fibers), tunica externa (iii) Generally no valves (except in pulmonary artery and some veins in limbs) (iv) Higher blood pressure (due to closer proximity to the heart and strong contraction of the left ventricle)

= VEINS = (i) Carry deoxygenated blood back to the heart from the body tissues (ii) Thinner walls with three layers: tunica intima, tunica media (less muscular and elastic than arteries), tunica externa (iii) Valves present, especially in limbs, to prevent backflow of blood (iv) Lower blood pressure (as blood has traveled through the body and lost pressure)

=====================================

(3ai) (PICK ANY FOUR) (i) Phototropism (ii) Gravitropism (iii) Thigmotropism (iv) Hydrotropism (v) Chemotropism (vi) Seismonastic

(3aii) (PICK ANY TWO) (i) Loss of fertile topsoil (ii) Reduction in water retention capacity (iii) Increased flooding and sedimentation (iv) Decline in crop yields and vegetation cover (v) Loss of biodiversity

(3bi) Grass → Grasshopper → Lizard → Hawk

(3bii) Check the diagram below

(3biii) (PICK ANY TWO) (i) Oxygen (ii) Water (iii) Glucose (iv) ATP

(4ai) (i) Humerus (ii) Radius (iii) Ulna

(4aii) Check the diagram below

(4bi) (PICK ANY THREE) (i) Insulin (ii) Glucagon (iii) Thyroid hormone (iv) Adrenaline (v) Cortisol (vi) Estrogen

(4bii) -Amoeba- (PICK ANY ONE) (i) Food vacuole (ii) Plasma membrane (iii) Contractile vacuole

-Hydra- (PICK ANY ONE) (i) Gastrovascular cavity (ii) Gastrodermis cells (iii) Choanocytes

-Earthworm- (PICK ANY ONE) (i) Nephridia (ii) Flame cells (iii) Chloragogen cells

-Grasshopper- (PICK ANY ONE) (i) Malpighian tubules (ii) Rectum (iii) Hindgut

(4biii) -Mitochondria- (PICK ANY ONE) (i) Produce energy (ATP) (ii) Regulation of cell death (iii) Control of cellular metabolism (iv) Protein synthesis (v) Calcium homeostasis

-Lysosomes- (PICK ANY ONE) (i) Digesting food particles and old organelles (ii) Detoxification and removal of waste products (iii) Regulation of cell death (autolysis) (iv) Defense against pathogens (v) Bone resorption

(5a) Draw the diagram below

(5bi) [In a Tabular form]

-Monocot Plants- (PICK ANY TWO) (i) Single cotyledon in the seed (ii) Parallel leaf veins (iii) Scattered vascular bundles in the stem (iv) Flower parts in multiples of three (v) No secondary growth (no cambium) (vi) Endosperm in the seed

-Dicot Plants- (PICK ANY TWO) (i) Two cotyledons in the seed (ii) Netted leaf veins (iii) Vascular bundles arranged in a ring in the stem (iv) Flower parts in multiples of four or five (v) Secondary growth (presence of cambium) (vi) No endosperm in the seed

(5bii) (PICK ANY FOUR) (i) Comparative Anatomy: Similarities in the structures and organs of different species, indicating common ancestry. (ii) Paleontology (Fossil Record): Remains of extinct organisms provide evidence of evolutionary change over time. (iii) Biogeography: Distribution of species on Earth supports the idea of evolution through diversification and dispersal. (iv) Molecular Biology: Similarities in DNA and protein sequences indicate shared ancestry and evolutionary relationships. (v) Vestigial Structures: Structures that have no apparent function present in an organism that suggest its evolutionary history. (vi) Developmental Biology: Embryological similarities in different species indicate common evolutionary origins. (vii) Genetic Variation: Mutations and recombination provide raw material for natural selection to work with.

(5biii) (i) Hinge Joints (ii) Pivot Joints (iii) Ball-and-Socket Joints

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NECO Biology Answers (OBJ & Essay) [5th August 2021]

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  1. NECO Biology Objective & Essay 2023: Questions and Answers A

    1. The Objective section of the NECO Biology exam consists of multiple-choice questions. This section assesses students' understanding of key concepts and their ability to apply this knowledge to solve problems. It is crucial to approach this section strategically to maximize your chances of success.

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    NECO Biology Essay Answers: (1ai) The cell theory states that: - All living organisms are made up of one or more cells. - The cell is the basic unit of life. - All cells arise from pre-existing cells. (1aii) - Robert Hooke, who discovered cells in 1665 and coined the term "cell". - Matthias Schleiden and Theodor Schwann, who ...

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    2024 NECO BIOLOGY (ESSAY) QUESTIONS AND ANSWERS: BIOLOGY ESSAY. NUMBER 1. (i) Filtration: Blood enters the glomerulus through the afferent arteriole and is filtered under pressure in the Bowman's capsule, removing water, ions, glucose, amino acids, and waste products like urea from the blood. (ii) Reabsorption: As the filtrate moves through ...

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    All NECO 2024 Commerce essay and OBJ answers is fully released. All students can now, see 2024 NECO Commerce Questions June/July, and how to pass the exam without stress. Friday 26th July, 2024 is the date scheduled for the examination.

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    NECO JUNE/JULY 2021 FREE BIOLOGY OBJ & ESSAY (BIO) QUESTION AND ANSWER ROOM. Thursday 5th August 2021 Paper III & II: Objective & Essay - Biology 10:00am - 12:30pm. NECO Biology Questions and Answers 2021 Objectives Answers (Expo) 1-10: ABBDEADBDC 11-20: bCCDDECDCA 21-30: DCEAEBBDAA 31-40: BBACAECAAB 41-50: ECDCBCECCC 51-60: ECBCDDDEAE