Jamb Biology 1992 Past Questions and Answers

Question 46:

• JAMB 1992

Woman do not suffer from colour blindness because

A. The trait is sex-linked
B. Only men are colour blind
C. The genes are recessive and sex-linked
D. The genes occur on both the X and Y chromosomes

Question 47:

• JAMB 1992

The hereditary materials of the cell is

A. The R N A
B. Protein
C. The D N A
D. Carbohydrate

Question 48:

• JAMB 1992

An example of plant adaptation to a xerophytic environment is represented by the development of

A. Fleshy tissue and reduced leaves
B. Broad canopy and extensive surface root system
C. Thick barks and broad leaves
D. Rough leaves and shallow root system

Question 49:

• JAMB 1992

Which of the following factors is LEAST likely to affect the animals living in a fresh water habitat?

A. Turbidity
B. Temperature
C. PH
D. Salinity

Question 50:

• JAMB 1992

The theory of natural selection was developed by

A. Lamarck and Darwin
B. Darwin and Wallace
C. Wallace and Mendel
D. Mendel and Larmack