WAEC Biology Past Questions & Answers - Page 129

641.

Which of the following groups of vertebrae have two branches at the end of their transverse processes?

A.

sacral

B.

thoracic

C.

cervical

D.

lumbar

Correct answer is D

No explanation has been provided for this answer.

642.

How many conjugants are involved in sexual reproduction of paramecium

A.

1

B.

2

C.

 4

D.

8

Correct answer is B

No explanation has been provided for this answer.

643.

When a person’s urine contains a high concentration of urea, it could be the result of

A.

a drop in body temperature

B.

having diabetes mellitus

C.

eating a meal rich in protein

D.

drinking a large amount of water

Correct answer is C

No explanation has been provided for this answer.

644.

The process by which a drop of ink spreads uniformly in a beaker of water is called

A.

absorption

B.

osmosis

C.

plasmolysis

D.

diffusion

Correct answer is D

No explanation has been provided for this answer.

645.

The nucleus controls the activities of the cell because it

A.

synthesize hormones

B.

is like a brain in the cell

C.

uses DNA to synthesize enzymes which are used in cell metabolism

D.

sends out nervous impulses to ensure the functioning of the cytoplasm

Correct answer is C

No explanation has been provided for this answer.