Biology questions and answers

Biology Questions and Answers

How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.

541.

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.

542.

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.

543.

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.

544.

The conversion of ammonium salts into nitrates is called_______

A.

putrefaction

B.

denitrification

C.

fixation

D.

nitrification

Correct answer is D

No explanation has been provided for this answer.

545.

Tooth decay is usually caused by___________

A.

undigested and absorbed food

B.

eating a limited amount of sweetened food.

C.

the bacteria ín the mouth that metabolize sugar to acids

D.

eating a lot of proteinous foods

Correct answer is C

No explanation has been provided for this answer.