ECOLOGY - Jamb Biology Past Questions and Answers

Question 91:

• JAMB 1989

Lichen is an example of

A. Saprophytic organism
B. A symbiotic association
C. An epiphytic plant
D. A carnivorous plant

Question 92:

• JAMB 1989

which of the ways of controlling bilharzia can result in pollution?

A. Clearing water weeds on which the snail feed
B. Treating infected people with drugs
C. Preventing contamination of water by infected urine and faeces
D. Applying chemical to kill the snails

Question 93:

• JAMB 1989

which of the following disease can be caused by a bacterium?

A. Ringworm
B. Poliomyelitis
C. Malaria
D. Syphilis

Question 94:

• JAMB 1989

Most irrigated lands often become unproductive in later years because of

A. Loss of fertility
B. Increase in salinity
C. Soil erosion
D. Loss of water

Question 95:

• JAMB 1989

Farmers practise crop rotation because it

A. Helps to prevent soil erosion
B. Allows two crops to be planted at the same time
C. Helps to conserve soil fertility
D. Is an alternate to shifting cultivation