JAMB Biology Past Questions & Answers - Page 71

351.

Albinism is an expression of traits controlled by

A.

Chromosomes

B.

Recessive genes

C.

Dominant genes

D.

Mutation

Correct answer is B

Albinism is the condition in which the skin of an animal is non-pigmented because it lacks Melanin. It is controlled by Recessive genes.

352.

The change in the genetic make up of an organism resulting in a new and inheritable characteristic is

A.

Mutation

B.

Locus

C.

Hybrid

D.

Diploid

Correct answer is A

Mutation involves the changes in the genes of an organism due to some factors resulting in a new character that can be inherited.

353.

The movement of blood between the heart and all other parts of the body besides the lungs is

A.

Double circulatory system

B.

Pulmonary system

C.

Single circulation

D.

Systemic circulation

Correct answer is D

Systemic circulation involves the movement of blood between the heart and all other parts of the body besides the lungs.

354.

Which organ removes the largest quantity of water from the blood?

A.

Lung

B.

Skin

C.

Kidney

D.

Intestine

Correct answer is C

The kidney is an organ that performs lots of functions. One is that it helps in removing large quantities of water from the blood in order to maintain balance in the body system.

355.

Which of the blood corpuscles are irregular and amoeboid 

A.

Leucocytes

B.

Erythrocytes

C.

Thrombocytes

D.

Plasma

Correct answer is A

Leucocytes are also called white blood cells. They are irregular and amoeboid.