Question 686:

• JAMB 1990

Physiological adaptation to very dry condition in animals is called

A. Hibernation
B. Aestivation
C. Rejuvenation
D. Xeromorphism

Question 687:

• JAMB 1990

Which set of disease is spread mainly by insect vectors?

A. Cholera, tenia and gonorrhoea
B. Poliomyelitis, tuberculosis and syphilis
C. Cholera, malaria and tuberculosis
D. Malaria, cholera and river blindness

Question 688:

• JAMB 1990

Which of the following constitute pollution?

A. Droppings from birds
B. Loud disco sound
C. A pack of cigarettes
D. Refuse in an incinerator

Question 689:

• JAMB 1990

An acidic soil can be improved upon by

A. Sedimentation
B. Leaching
C. Flocculation
D. Watering

Question 690:

• JAMB 1990

What do bacteria in root nodules derive from the host plant?

A. Protection and minerals
B. Water and minerals
C. Carbonhydrates and water
D. Protection and carbohydrates