Biology 2003 Jamb Past Questions and Answers

Question 36 :

• JAMB 2003

Soil fertility can best be conserved by the activities of

A. Earthworm
B. Man
C. Rodent
D. Microbes

Question 37 :

• JAMB 2003

The pioneer organisms in ecological succession are usually the

A. Mosses
B. Lichens
C. Ferns
D. Algae

Question 38 :

• JAMB 2003

If a DNA strand has a base sequence TCA, its complementary strand must be

A. ATG
B. TAG
C. GAT
D. AGT

Question 39 :

• JAMB 2003

A man and his wife are both heterozyous for the sickle-cell trait. The likely percentage of their offspring that will be either carriers or sicklers is

A. 75%
B. 50%
C. 25%
D. 100%

Question 40 :

• JAMB 2003

If the pair of alleles for baldness is given as Bb, a female carrier will be denoted by

A. X^bY^B
B. X^BX^B
C. X^BY
D. X^BbX^b