WAEC Biology Past Questions & Answers - Page 8

36.

Fishes survive in water mainly because they possess

A.

streamlined body

B.

scales

C.

paired fins

D.

gills

Correct answer is D

Gills are specialized respiratory organs found in fish that allow them to extract oxygen from water. While a streamlined body, scales, and paired fins are all essential adaptations for fish to navigate and survive in water, none of them directly relate to the process of oxygen extraction and respiration like gills do. However, without gills, fish would not be able to respire efficiently underwater and would not survive in their aquatic habitats.

37.

The diagram below is an illustration of a cell in which photosynthesis takes place. Study it and answer the question.

the oxygen gas formed in the cell diffuses out of the cytoplasm into the air spaces through the part labeled

A.

I

B.

II

C.

III

D.

IV

Correct answer is C

No explanation has been provided for this answer.

38.

The diagram below is an illustration of a cell in which photosynthesis takes place. Study it and answer the question.

In which of the labeled parts would molecules of water and carbon (IV) oxide combine to form sugar?

A.

I

B.

III

C.

II

D.

IV

Correct answer is D

No explanation has been provided for this answer.

39.

Which of the following processes does not occur during photosynthesis?

A.

Energy from sunlight is absorbed

B.

Carbon (IV) oxide is evolved

C.

oxygen is evolved

D.

water is split

Correct answer is B

During photosynthesis, carbon dioxide is taken in by the plant, and water is split to produce glucose and oxygen in the presence of sunlight and chlorophyll.

40.

Growth in animals differs from that in plants because growth in

A.

plants is indefinite

B.

plants is intercalary

C.

animals is apical

D.

plants is from within

Correct answer is A

Growth in plants is indefinite: Unlike animals, which typically have a determinate growth, many plants exhibit indeterminate growth, especially in their early stages of life. Indeterminate growth means that plants can continue to grow throughout their lives, adding new tissues and expanding in size as long as favorable conditions are present.