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.

2,226.

The importance of courtship in animals includes the following except

A.

ensuring that the female chooses the right male species

B.

arousing both male and female partners

C.

protection of territory

D.

to coincide with the ovulation period and ensure fertilization

Correct answer is D

No explanation has been provided for this answer.

2,227.

The percentage probability that a normal male married to a carrier woman would have a haemophilic male child is

A.

35%

B.

50%

C.

75%

D.

100%

Correct answer is B

No explanation has been provided for this answer.

2,228.

What would be the phenotypic ratio of the offspring of a cross between a heterozygous dominant parent and a double recessive parent?

A.

1 : 2: 1

B.

1 : 1

C.

3 :1

D.

2 : 1

Correct answer is B

No explanation has been provided for this answer.

2,229.

Which of the following statements is correct about the structure of a chromosome? A chromosome consists of

A.

two chromatids joined at the centromere

B.

Two chromatids joined at the spindle

C.

Two chromatin threads joined at the centrioles

D.

thread-like structures not joined together

Correct answer is A

No explanation has been provided for this answer.

2,230.

In a family of eight (8), all the children are girls. Which of the following reasons correctly explains this?

A.

The woman cannot produce male children

B.

The man has a low sperm count

C.

The Y component of the man’s sex chromosome was always involved

D.

The X component of the man’s sex chromosome was always involved

Correct answer is D

No explanation has been provided for this answer.