Jamb Biology 1991 Past Questions and Answers

Question 46:

• JAMB 1991

Fertilizers are lost from the soil through

A. Sheet erosion and evaporation
B. Leaching, underground seepages and run-off
C. Sheet erosion, gully erosion and wind erosion
D. Wind erosion and heavy rainfall

Question 47:

• JAMB 1991

Nitrogen- fixing micro-organisms in leguminous plants live symbiotically in the

A. Root nodules
B. Tap root
C. Branch roots
D. Root hairs

Question 48:

• JAMB 1991

The structure labelled 4 is for

A. Feeding
B. Attachment
C. Excretion
D. Respiration

Question 49:

• JAMB 1991

As the tadpole develops, the structure labelled 5

A. Grows longer
B. Becomes shorter
C. Becomes the hind legs
D. Remains unchanged

Question 50:

• JAMB 1991

In the digestive system, absorption of nutrient into the blood takes place in the part labelled

A. 1
B. 2
C. 3
D. 4