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.

3,172.

The nephridia in the earthworm form part of the

A.

reproductive system

B.

respiratory system

C.

circulatory system

D.

excretory system

Correct answer is D

In earthworms, members of the phylum Annelida, the excretory system consists of structural units called nephridia (the singular is nephridium).

3,173.

A farmer's assumption that the seed from a good harvest will produce a good yield is explained by the theory of

A.

evolution

B.

adaptation

C.

variation

D.

heredity

Correct answer is D

No explanation has been provided for this answer.

3,174.

A phenotypic character with intermediate forms that can be graded from one extreme to the other is referred to as?

A.

discontinuous variation

B.

continuous variation

C.

a mutant

D.

a genome

Correct answer is B

Variations can be:

  • Discontinuous or discrete and is often caused by the presence or absence of a small number of genes.

We can all either roll our tongue or not; there's nothing in between.

Others are Eye colour, handedness, & lobed/lobeless ears.

  • Continuous or quantitative, smoothly grading between two extremes: Hand span, arm length, & height. 

3,175.

The uniqueness of an individual organism in a population is accounted for by

A.

evolution

B.

variation

C.

adaptation

D.

mutation

Correct answer is B

Variation is the difference between individuals within a species.

Variations could occur by inherited or acquired characteristics.