WAEC Biology Past Questions & Answers - Page 295

1,471.

Which of the following processes is not due to interaction between the biotic and abiotic components of an
ecosystem?

A.

Soil nutrient depletion

B.

Condensation

C.

Decomposition

D.

Osmosis

E.

Photosynthesis

Correct answer is D

No explanation has been provided for this answer.

1,472.

Hydra captures small crustaceans with the

A.

pseudopodia

B.

musculo-epithelial cells

C.

tentacles

D.

enteron

E.

ectoderm

Correct answer is C

No explanation has been provided for this answer.

1,473.

Which of the following is responsible for the conversion of nitrites to nitrates in the nitrogen cycle?

A.

Denitrifying bacteria

B.

Nitrifying bacteria

C.

Lightening

D.

Fungi

E.

Brown algae

Correct answer is B

No explanation has been provided for this answer.

1,474.

In a water culture experiment, the culture solution in a transparent beaker turned green. What precaution
should have been taken to prevent the culture solution from turning green?

A.

Changing the culture solution regularly

B.

Increasing the number of times the culture is aerated

C.

Covering the transparent beaker with black cloth

D.

Adding warm alcohol to bleach the green colour

E.

Sterilizing the beaker in a hot oven before use

Correct answer is C

No explanation has been provided for this answer.

1,475.

In grasshopper/cockroach digestion starts from the

A.

oesophagus

B.

crop

C.

gizzard

D.

midgut

E.

mouth

Correct answer is E

No explanation has been provided for this answer.