WAEC Biology Past Questions & Answers - Page 44

216.

An organism at the start of a food chain which provides the total input energy into an ecosystem is the

A.

sun

B.

producer

C.

consumer

D.

decomposer

Correct answer is B

No explanation has been provided for this answer.

217.

The capillarity of a soil refers to

A.

the particle size of soil

B.

how easily water passes through soil

C.

how well water rises up in soil

D.

proportion of water a soil holds

Correct answer is C

No explanation has been provided for this answer.

218.

The major problem experience by organisms living in small water bodies is

A.

drying up

B.

oxygen deficiency

C.

scarcity of food

D.

wave action

Correct answer is A

No explanation has been provided for this answer.

219.

Which of the following components make up an ecosystem?

A.

Decomposers, animals and non-living factors

B.

Living and non-living factors

C.

Plants and non-living factors

D.

Plants decomposers and non-living factors

Correct answer is B

No explanation has been provided for this answer.

220.

A community reaches a climax when

A.

only pioneer organisms are present

B.

new habitats are constantly being formed

C.

there is an introduction of new plants and animal species within the community

D.

the composition and size of a community remains constant over a long period

Correct answer is D

No explanation has been provided for this answer.