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.

3,421.

If XN is the dominant allele for normal vision and Xn the recessive allele for colour blindness, a boy with the genotype YXn will be

A.

have normal vision

B.

be colour-blind

C.

be totally blind

D.

be a carrier of colour blindness

Correct answer is D

The boy is a carrier because Xn is the recessive allele for colour blindness.

3,422.

In a population of living things, the parameters of size, height, weight, and colour are examples of

A.

discontinuous variation

B.

continuous variation

C.

physiological variation

D.

non-heritable variation

Correct answer is B

No explanation has been provided for this answer.

3,423.

To select and retain the desirable trait of large body size which a farmer has observed in his herd, the farmer needs to

A.

feed the animals in the herd with more food

B.

cross-breed his animals with a different herd

C.

inbreed the animals in the herd

D.

prevent disease in the herd

Correct answer is C

No explanation has been provided for this answer.

3,424.

Tissue respiration is important for the

A.

absorption of oxygen into the alveoli

B.

release of carbon (IV) oxide into the lungs

C.

release of energy for the body use

D.

exhalation of carbon(IV) oxide from the lungs

Correct answer is C

No explanation has been provided for this answer.

3,425.

A person that is obese must avoid meals containing

A.

carrots and oranges

B.

margarine and butter

C.

beef and beans

D.

rice and yam

Correct answer is B

No explanation has been provided for this answer.