Jamb Biology 1991 Past Questions and Answers

Question 41:

• JAMB 1991

A food web is more stable than a food chain because

A. It contains more organisms
B. It has greater energy source
C. It is not easy to destroy
D. Every organism has an alternative source

Question 42:

• JAMB 1991

Which of the following is likely to occur in a deciduous forest during the dry season?

A. New leaves are formed
B. The trees die off
C. The undergrowth increases
D. The ground becomes bare

Question 43:

• JAMB 1991

Which of these is NOT an adaptive features for arboreal life?

A. Possession of long tail
B. Possession of claws
C. Possession of teeths
D. Counter shading in coat colour

Question 44:

• JAMB 1991

Which of the following diseases can be prevented by innoculation?

A. Syphilis
B. Malaria fever
C. Tuberculosis
D. Acquired Immune Deficiency Syndrom

Question 45:

• JAMB 1991

Sources of air pollutants are

A. Industrial chimneys, burning fossil oils and river dam
B. Sulphur dioxide, acid rain and pesticides
C. Sulphur mines, vehicle exhausts and aerosols
D. Sewage, smoke and old vehicle