JAMB Biology Past Questions & Answers - Page 117

581.

Use the diagram below to answer this question.

The structure that controls loss of water vapour during transpiration is labelled

A.

l

B.

ll

C.

lll

D.

lV

Correct answer is D

The stomata regulates gas exchange between the plant and environment and controls water loss by changing the size of the stomatal pore.

Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. 

582.

Use the diagram below to answer this question.

With respect to their decreasing dependence on aquatic conditions for reproduction, which of the following is the correct arrangement of the animals represented?

A.

l, IV, II, and lll

B.

IV, lll, ll, and l

C.

l, ll, IV, and lll

D.

lll, ll, IV, and l

Correct answer is B

- Like frogs, most toads lay their fertilized eggs in water, where they hatch into tadpoles before developing into adult toads. These amphibians need a safe, undisturbed body of water to lay their eggs in. However, a few species breed on land.

- the mother alligator typically lays about 35 eggs in a nest made of mud, sticks, and other plant matter. 

- Rabbits sometimes dig a burrow in which to give birth

583.

Use the diagram below to answer this question.

Based on the shape and structure of the beak and feet, the bird represented is likely to feed mainly on

A.

flesh

B.

fruits

C.

seeds

D.

nectar

Correct answer is A

No explanation has been provided for this answer.

584.

Use the diagram below to answer this question.

The main function of the feathers covering the part labeled I is to?

A.

prevent ectoparasites from attacking the animal

B.

generate heat to keep the animal warm

C.

provide some power for flight

D.

serve as insulator to maintain body heat

Correct answer is D

No explanation has been provided for this answer.

585.

Use the diagram below to answer this question.

During photosynthesis, the arrow labeled ll represents the

A.

escape of mineral salts

B.

absorption of energy from the sun

C.

release of carbon (IV) oxide

D.

release of oxygen as a by-product

Correct answer is D

No explanation has been provided for this answer.