WAEC Biology Past Questions & Answers - Page 60

296.

Which of the following soil fertility improvement methods will have the most negative effect on the ecosystem if not controlled?

A.

Application of N-P-K fertilizer

B.

Shifting cultivation

C.

Mixed farming

D.

Crop rotation

Correct answer is A

No explanation has been provided for this answer.

297.

The specific role of a species within íts environment is known as its_________

A.

habitat

B.

niche

C.

trophic level

D.

biotic community

Correct answer is B

No explanation has been provided for this answer.

298.

The complex relationship between the members of a community and their physical environment is known as________

A.

commensalism

B.

symbiosis

C.

saprophytism

D.

ecology

Correct answer is D

No explanation has been provided for this answer.

299.

If 90 ants are found in a field with a total area of 100m. what is the population density of the ants?

A.

0.09

B.

0.90

C.

9.00

D.

90.00

Correct answer is B

No explanation has been provided for this answer.

300.

The salinity of a brackish habitat________

A.

increases immediately after rainfall

B.

increases at the end of the rain

C.

decreases with an increase in the number of organisms

D.

increases during the dry season

Correct answer is D

No explanation has been provided for this answer.