WAEC Biology Past Questions & Answers - Page 124

616.

An importance of food web is that living organisms 

A.

use web to collect food

B.

can live on their own

C.

have to form a web

D.

depend on one another for their existence

Correct answer is D

No explanation has been provided for this answer.

617.

Conservation of soil fertility employs crop rotation because

A.

crops are allowed to grow at their own rates

B.

it encourages the healthy growth of plants

C.

it allows utilization of soil nutrients at different levels

D.

different crops grow at the same time

Correct answer is C

No explanation has been provided for this answer.

618.

Which of the following is not essential in the studying of the ecological factors that directly affect plants?

A.

wind

B.

temperature

C.

herbivores

D.

carnivores

Correct answer is D

No explanation has been provided for this answer.

619.

Biosphere is best described as

A.

all parts of the earth where life exists

B.

the non-living parts of an ecosystem

C.

a components of an ecosystem

D.

all the members of a single species in a habitat

Correct answer is A

No explanation has been provided for this answer.

620.

Which of the following teeth are well-developed to form the carnassial teeth of carnivorous mammals? The

A.

first lower premolar and third upper molar

B.

first lower molar and third upper premolar

C.

second lower premolar and first lower molar

D.

first lower molar and last upper premolar

Correct answer is D

No explanation has been provided for this answer.