WAEC Past Questions and Answers - Page 3435

17,171.

Underground storage stems which grow horizontally in the soil are_______

A.

bulbs

B.

runners

C.

rhizomes

D.

corms

Correct answer is C

No explanation has been provided for this answer.

17,172.

Anaerobic respiration in the organism illustrated in the diagram above produces carbon dioxide and________

A.

ethanol

B.

oxygen

C.

water

D.

glucose

Correct answer is A

No explanation has been provided for this answer.

17,173.

The rate of diffusion of molecules between two media will be higher if_________?

A.

the difference in concentration of the two media is low

B.

the difference in concentration of the two media is negligible

C.

the difference in concentration of the two media is high

D.

there is no difference in the concentration of the two media

Correct answer is C

Difference in concentration affects the rate of diffusion. The greater the concentration gradient, the quicker diffusion takes place.

17,174.

The part labelled I is the________

A.

centromere

B.

spindle fibre

C.

centriole

D.

chiasmata

Correct answer is A

No explanation has been provided for this answer.

17,175.

The diagram above is an illustration of a stage in a biological process. Study it and answer this question

What stage of cell division is illustrated in the diagram?

A.

Prophase

B.

Metaphase

C.

Anaphase

D.

Telophase

Correct answer is B

No explanation has been provided for this answer.