Exam Body

Year

Subject

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WAEC 2022 Biology | Objective

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Question 1 View Details

Which of the following statements about living things is correct?

A. Animals respire using carbon (IV) oxide as a raw material

Correct B. Growth in plants is limited after some time

C. Most plants respond to stimulus slowly

D. Higher animals can reproduce asexually

Correct Answer: B

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Question 2 View Details

Organ level of organization in living things is found in

A. waterleaf plant.

B. virus particle.

Correct C. kidney.

D. spermatozoon.

Correct Answer: C

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Question 3 View Details

TESTLET - T1

Diagrams X and Y below are illustrations of transverse sections of a part of plants. Study them and answer questions 3 to 5.

Which of the following statements is not correct? Diagrams X and Y are sections of

A. roots.

B. a dicotyledonous root and a monocotyledonous root respectively.

C. vascular bundles.

Correct D. stems.

Correct Answer: D

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Question 4 View Details

The part responsible for conducting water and dissolved mineral salts from the soil to the leaves is labelled

A. I.

Correct B. II.

C. III

D. IV.

Correct Answer: B

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Question 5 View Details

The part labelled II is the

A. pith.

Correct B. xylem.

C. phloem.

D. endodermis.

Correct Answer: B

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Question 6 View Details

The organelles in cells which are also referred to as suicidal bags are the

A. mitochondria.

Correct B. lysosomes.

C. ribosomes.

D. nuclei.

Correct Answer: B

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Question 7 View Details

The process that brings about the shrinking of a Spirogyra cell when placed in a strong solution is

A. osmosis.

B. autolysis.

Correct C. plasmolysis.

D. diffusion.

Correct Answer: C

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Question 8 View Details

The region of a plant stem in which cells divide to increase its diameter is the

Correct A. cambium,

B. phloem,

C. xylem.

D. collenchyma.

Correct Answer: A

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Question 9 View Details

The total number of caudal vertebrae in animals X and Y is 4 and 27 respectively. The animals are likely to be

A. fish and human.

B. toad and rat.

Correct C. toad and fish.

D. humans and rat.

Correct Answer: C

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Question 10 View Details

Which of the following blood components has the greatest affinity for oxygen and carbon (IV) oxide?

A. Lymphocyte

Correct B. Erythrocyte

C. Blood plasma

D. Thrombocyte

Correct Answer: B

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Question 11 View Details

INSTRUCTION - P1

Use the following processes to answer questions 11 and 12.
I - Ribs move upward and outward
II - Diaphragm relaxes
II - Volume of thorax increases
IV - Air is forced out of the lungs

Which of the processes take place during inspiration?

Correct A. I and III only

B. II and III only

C. II and IV only

D. III and IV only

Correct Answer: A

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Question 12 View Details

Which of the processes is a direct result of contraction of the intercostal muscles?

Correct A. I

B. II

C. III

D. IV

Correct Answer: A

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Question 13 View Details

The process by which the amount of water and solutes in the blood are controlled is known as

A. haemolysis.

B. diffusion.

C. turgidity.

Correct D. osmoregulation.

Correct Answer: D

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Question 14 View Details

TABLE - T2

The table below shows the effect of hormones I, II, III and IV on some parts of the human body. Where (✓) represents effect and (×) represents no effect of hormone on the corresponding part of the body. Study it and answer questions 14 and 15.

\(
\begin{array}[t]{|c|c|}
\hline 
& \text{Effect on} \\
\hline 
\text{Hormone} & 
  \begin{array}{c|c|c|c} 
  \text{Heart} & \text{Digestive system} & \text{Kidney} & \text{Uterus} 
  \end{array} \\
\hline 
\text{I} & 
  \begin{array}{c|c|c|c} 
  ✓ & ✓ & ✓ & ✓ 
  \end{array} \\
\hline 
\text{II} & 
  \begin{array}{c|c|c|c} 
  × & \times & \phantom{✓} & × 
  \end{array} \\
\hline 
\text{III} & 
  \begin{array}{c|c|c|c} 
  × & \times & \times & ✓ 
  \end{array} \\
\hline 
\text{IV} & 
  \begin{array}{c|c|c|c} 
  \times & ✓ & \times & × 
  \end{array} \\
\hline
\end{array}
\)

Which of the following hormones are I, II, III and IV respectively?

A. ADH, Glucagon, Oestrogen, Adrenaline

Correct B. Adrenaline, Glucagon, Oestrogen, ADH

C. Glucagon, ADH, Oestrogen, Adrenaline

D. Adrenaline, ADH, Oestrogen, Glucagon

Correct Answer: B

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Question 15 View Details

The hormone responsible for anxiety is

Correct A. I.

B. II

C. III

D. IV

Correct Answer: A

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Question 16 View Details

DIAGRAM - D1

The diagram is an illustration of some parts of a mammalian ear. Study it and answer questions 16 to 18.

The parts labelled I are the

A. semi circular canals.

Correct B. ossicles.

C. cochlea.

D. external auditory meatus.

Correct Answer: B

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Question 17 View Details

Which of the parts are correctly grouped? Inner ear Middle ear Outer ear

Correct A. I, IV & III

B. III & II, IV

C. I & II & III, IV

D. II & I, II & IV

Correct Answer: A

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Question 18 View Details

The middle ear is connected to the pharynx by the part labelled

A. I.

B. II

Correct C. III

D. IV.

Correct Answer: C

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Question 19 View Details

TESTLET - T3

The diagrams are illustrations of two different cells involved in a biological process in mammals. Study them and answer questions 19 to 21.

Which parts of P and Q fuse to complete the biological process?

Correct A. III and I.

B. IV and I

C. III and II

D. IV and II

Correct Answer: A

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Question 20 View Details

Which of the following statements about P and Q is correct?

A. Both cells are structures for asexual reproduction

B. Both cells normally belong to the same individual

C. Both cells are found in plants

Correct D. The union of both cells gives rise to a new mammal

Correct Answer: D

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Question 21 View Details

If the number of chromosomes in the skin cells of mammals is 46, how many chromosomes would be found in P and Q respectively?

Correct A. 23 and 23

B. 23 and 46

C. 46 and 23

D. 46 and 46

Correct Answer: A

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Question 22 View Details

In which of the following structures is simple sugar produced?

Correct A. Vacuole

B. Cytoplasm

C. Chloroplast

D. Cell wall

Correct Answer: A

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Question 23 View Details

An evidence of the occurrence of photosynthesis in an experiment is the

Correct A. release of carbon (IV) oxide.

B. release of oxygen.

C. formation of water molecules.

D. formation and release of fructose.

Correct Answer: A

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Question 24 View Details

The major sources of vitamin A are

Correct A. egg yolk, carrot and palm oil.

B. mango, pawpaw and eggs.

C. sorghum, soya bean and liver.

D. rice bran, green vegetables and milk.

Correct Answer: A

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Question 25 View Details

Which of the illustrated food substances would form a reaction with protease J?

Correct A. K

B. L

C. M

D. N

Correct Answer: A

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