WAEC Biology Questions and Answers 2022/2023 OBJECTIVE & ESSAY/THEORY

WAEC Biology marking schemes is likely to change, which is one of the main reasons why you need the live WAEC Biology Questions and Answers 2022 to prepare for your examinations. Despite the fact that we recommend that you use the WAEC Biology past questions 2021, we think that the Biology waec question 2021 will be very different from what you have seen in previous years. And no one has any way of knowing what will happen. On this website, we will supply you with the original live WAEC Biology Questions and Answers, so you will not have to worry.

You might be one of the 2022 WAEC aspirants who is looking forward to get the appropriate WAEC Biology Questions and Answers 2022 expo runs solutions so that you can pass the 2022 WAEC Biology exams and come out with flying colors. If this is all what you have been waiting for, you have arrived here on time.

Don’t forget, the most recent information and make use of the WAEC Biology Questions and Answers exam solutions for 2022 that will be provided to you on this website.

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WAEC Biology OBJ Answers Sample Questions 2022 – WAEC Biology Questions and Answers (Expo) 2022

Exam Pattern:

WAEC Biology exam comes in theory, OBJ, and practical papers. It has paper one, paper two, and paper three. Paper 1 is the Objective paper (OBJ), Paper 2 is Theory (essay), paper 3 is the practical paper.

1. What is another Name for larva?

  1. Nymph
  2. Maggot
  3. Caterpillar
  4. Chrysalis

2. Which source of energy do plants need to produce food?

  1. Photosynthesis
  2. Chlorophyll
  3. Sunlight
  4. Microorganisms

3. Which of the following is the major difference between animal and plant nutrition?

The plant has the ability to synthesize:

  1. Food for plants and animals
  2. B Water for plants
  3. Water for animals
  4. Food for plants only.

4. The process of converting starch into maltose is known as____?

  1. Hydrolysis
  2. Condensation
  3. Translocation
  4. Photosynthesis

5. What Causes the ascent of water in a tall tree?

  1. Adhesive forces
  2. Transpiration pull
  3. Root pressure
  4. Cohesive force

6. Which of these substances digestion will be affected if the duodenum of a patient is removed surgically?

  1. Starch and protein only
  2. Starch and lipids
  3. Starch, protein, and maltose
  4. Starch, protein, and lipids.

WAEC Biology Theory Questions and Answers Sample Questions 2022

Section B [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?
(iii) State four characteristic features associated with respiratory structures.
c. (i) What is oxygen debt?
(ii) Outline three activities that can result in oxygen debt.

ANS: (a) (ii) Differences between gaseous exchange and aerobic respiration Gaseous exchange                –              Aerobic respiration -oxygen simply moves into the     –     oxygen is used to oxidise glucose organism and CO2 moves out; -the process takes place outside the cells process occurs inside the cells -physical process chemical process -no energy is released -no enzymes involved

(b) (i) Residual Air. 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)  Importance of Residual Air. Air is left in the lungs so that the lungs do not collapse; the air is always left inside the lungs so that more oxygen can be removed (diffuse) into the bloodstream.

(d) (i) Oxygen debt. 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) Activities that can result in oxygen debt. Running; boxing; swimming /any correct example of strenuous activities.

2. a. What is photosynthesis?

b. List: (i) four external factors;
(ii)   two internal factors; that affect the rate of photosynthesis.
c. (i) List the major products of the light-dependent stage of photosynthesis.
(ii) State the importance of each of the products listed in 2(c) (i) above.
d. (i)Explain why there are no green plants at the lower depths of some lakes.
(ii) State why decomposers are important to flowering plants.

3. (a) Explain the following terms: (i) disease; (ii) symptoms of diseases

(b) (i) List two physical and two chemical barriers that prevent pathogens from penetrating the body of an organism.
(ii) Explain how vaccination protects the body from contracting infectious diseases.
(c) Distinguish between an antibody and an antigen.
(d) Name the causative agents of: (i) Malaria; (ii) Cholera; (iii) AIDS.

4. (a) (i) What is excretion?

(ii) List the excretory organs in humans and name one waste product excreted by each organ.
(b) How does the mammalian kidney function as an excretory organ?
(c) Name the excretory organs in (i) insects; (ii) earthworms.

5. (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 5(a) (ii) above.
(c) (i) What is Eutrophication?
(ii) State two causes of eutrophication.

6. (a) Describe the carbon cycle. (b) State the functions of: (i) nitrogen fixing bacteria; (ii) nitrifying bacteria; (iii) denitrifying bacteria; in nature.

ANS: (a) Carbon occurs in the air/ atmosphere/as carbon dioxide/dissolved in the oceans /seas/ water bodies, and is circulated continuously; through the activity of microorganisms /decay bacteria/ saprophytic organisms /fungi; which decompose the dead organisms; plants /animals release carbon dioxide and water; the carbon dioxide released increases the concentration of carbon in the atmosphere /ocean/ sea /water bodies; this is further increased by respiration in plants and animals;

combustion of wood/ coal/ oil/ fuel; some of the excess carbon dioxides is absorbed by the sea /water bodies and also used by plants in photosynthesis; organisms in seas /oceans /water bodies release carbon dioxide into the atmosphere/ water.

(b) Functions of – (i) Nitrogen-Fixing Bacteria; Nitrogen-fixing bacteria in the nodules of legumes; those living freely in the soil; convert atmospheric nitrogen; into ammonia /ammonium compounds.

(ii) Nitrifying Bacteria; They live freely in the soil; oxidize/breakdown the ammonium compounds; to nitrites; which are then oxidized by others/ Nitrobacter/ named bacteria; to nitrates.

(iii) Denitrifying Bacteria; They live freely in the soil; these break down/ oxidize ammonium compounds; into nitrogen; and oxygen; which is released into the atmosphere.

7. (a) (i) What is a gene?

(ii) Differentiate between the terms genotype and phenotype.
(b) Explain the following terms: (i) hybrid; (ii) pure breeding; (iii) nucleotide.
(c) In garden pea seeds, a smooth seed coat is dominant over a rough seed coat. With the aid of a genetic diagram, determine the result expected if a homozygous rough pea is crossed with a smooth seed coat plant whose parent were rough-coated.

8. (a) (i) Describe epigeal germination of a seed.

(ii) In a tabular form, state three differences between epigeal germination and hypogeal germination.
(b) (i)  What is seed dormancy?
(ii) State three ways by which dormancy in seeds can be broken.
(c) State six advantages of using contraceptives in human populations.

9.WAEC Biology Questions and Answers, biology anaerobic respiration

WAEC GCE Objective Questions 2021.

Section A [Objectives] Answer ALL questions.
Shade your answers on the answer booklet provided.

1. Where are most nitrogen compounds excreted from humans?
A. kidneys B. liver C. rectum D skin.

2. A motor neurone transmits impulses from A muscle to the spinal cord. B receptor to muscle. C receptor to the spinal cord. D spinal cord to muscle.

3. In which order does light pass through these structures in the eye?

A. cornea → aqueous humour → lens → vitreous humour → retina
B. cornea → vitreous humour → lens → aqueous humour → retina
C. lens → aqueous humour → cornea → vitreous humour → retina
D. lens → vitreous humour → cornea → aqueous humour → retina.

4. A person with Down’s syndrome is born with 47 chromosomes in each cell, instead of 46. What could cause this?

A. A mutation happened during the production of the egg cell.
B. More than one sperm fused with the egg at fertilisation.
C. Radiation caused a change in the structure of a gene in the father’s sperm.
D. The mother was exposed to harmful chemicals while she was pregnant.

5. A red-flowered plant is crossed with a white-flowered plant. All the offspring have red flowers. What is the genotype of these offspring?

A. RR and Rr
B. RR only
C. Rr only
D. rr only.

6. A plant has flowers whose anthers mature and fall off before the stigma is fully developed. What will this prevent?

A. cross-pollination B. insect-pollination C. self-pollination D. wind-pollination.

7. The cell wall of a plant cell is removed using an enzyme. What would happen if this cell is then placed in distilled water?

A. It would take longer for the cell to become turgid.
B. Proteins in the cytoplasm would leave through the cell membrane.
C. The cell would become smaller as water passes out.
D. The cell would burst as water moves into it.

8. Some organisms live at the bottom of the seas where it is very dark. To synthesise glucose, they use energy from chemicals in the very hot water that comes out of volcanoes. What is a distinguishing feature of these organisms?

A. Their enzymes are easily denatured by heat.
B. They do not need carbon dioxide.
C. They do not need to be green.
D. They obtain energy only as carnivores.

9. Under which set of conditions will the transpiration rate of a well-watered plant be fastest?

A. a cool, dry, windless day
B. a cool, rainy, windy day
C. a hot, dry, windy day
D. a hot, rainy, windy day.

10. Why is glucose found in the urine of diabetics?

A. increased uptake and use of glucose by the body cells
B. not enough glucose in the blood is converted to glycogen
C. stored fats in the body are being oxidized
D. too much glucose is absorbed by the kidney cells.

11. Which bones form a joint at the shoulder?

A. humerus and scapula B. humerus and ulna C. radius and ulna D. radius and scapula.

12. Which sequence describes the flow of energy in an ecosystem?

A. carnivore → herbivore → plant → Sun
B. plant → herbivore → carnivore → Sun
C. Sun → carnivore → herbivore → plant
D. Sun → plant → herbivore → carnivore.

How to Get WAEC Biology Questions and Answers 2022/2023 for FREE

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How to Pass WAEC Biology Exams 2022 | WAEC Biology Expo 2022

1. Put Reading First.

People who claim that they must stop reading because they have completed their education are completely wrong. It’s a completely erroneous belief or perception to think that once you have completed your education it’s all over. Learning never stops you know; anyone who stops reading or learning will be living with old information and will move around with it. We live in a world that is constantly changing, and in order to be a very successful human being in today’s society, you must keep up with the latest information.

In reality, relying on a single author for ideas or information is not a proper way of getting updated information. To amass enough information, read as many books as possible.

We implore all applicants who are about to take the WAEC Biology exams 2022 to continue reading books relating to their field of interest on a regular basis.

2. Obtain the Appropriate Preparatory Materials

Exam preparation should not be limited to reading books. The question you should ask yourself is, “What kind of book am I reading, and how will it help me pass the WAEC Biology exams?” Here is what you should consider as appropriate prepared material: textbooks, dictionaries, waec Past Questions and Answers and so on.

3. Attend Extra-Classes.

Attending extra moral classes can be a source of pride for some people. Some people believe they are too big and are unconcerned about it. This is a completely incorrect viewpoint, and you must change it. Extra classes will help you grow, extend, and broaden your intellectual capacity, making it easier for you to understand things.

Extra moral classes, organized by educational tutors, can be observed all over. This type of class can be held after school in the evenings, during the holidays, or after the school day has ended for the term or session.

You will never be sorry if you attend one.

4. Set Out Time for Rest

Many people who are studying for impending examinations are unaware of the importance of rest and sleep. It’s a once-in-a-lifetime opportunity. When you take time to rest or sleep, your brain relaxes and your mind calms. Everything is new and your strength has been renewed by the time you wake up. If you force yourself to read when you are sleepy or exhausted, you will not be able to perform better; you will fall asleep quickly, and by the time you wake up, everything you read will have vanished.

This is something that all UTME candidates should be aware of because it is really significant.

5. Maintain a Healthy Way of Life

One of the things that will motivate you as a person is to eat properly and live a healthy lifestyle. You can easily get sick if you don’t eat well and healthily, such as consuming meals that aren’t truly clean, low-quality foods, and you don’t build up your cells to be immune to sickness.

During the process of studying for tests, many students or candidates become weary, dizzy, and even sick. To avoid this, as soon as you notice a symptom of disease, make an appointment with a doctor, your parents, or the people you live with for additional medical attention.

6. Chatting on social media should be limited.

It is not a proper thing to spend 80% of your time on social media sites such as Facebook, Twitter, Instagram, and others, and just 20% of your time on your academics. You’ll never be able to create it that way. At the very least, make it 80/20. 80 percent of your time should be spent studying and researching in preparation for your upcoming waec exams.

You may always go back to those things after you have finished your waec exams. FOCUS is the key word here.

This is the extent of our discussion at this time. We will provide more information as soon as we lay our hands on it. If you found this post useful, please share it with others.

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