Question 81:

• JAMB 1978

which of these elements in plants is required in small quantities only

A. Boron
B. Nitrogen
C. Phosphorus
D. Magnesium
E. Potassium

Question 82:

• JAMB 1978

a potometer was used to compare the rate of loss of the same volume of water from a plant under different environmental conditions as under a fan, at the sea shore, under the sun, in the airy laboratory and in cupboard. What time was likely to have been obtained in a cupboard?

A. 15 secs
B. 30secs
C. 25secs
D. 20secs
E. 28secs

Question 83:

• JAMB 1978

The mammalian stomach can carry out a number of processes except

A. Absorption of glucose
B. Secretion of hydrochloric acid
C. Secretion gastric juice
D. Churning of food
E. Production of trypsin

Question 84:

• JAMB 1978

A spirogyra cell placed was placed in solution X after 1 minute the cell has been plasmolysed, solution X was

A. Tap water
B. A very strong sugar solution
C. A weak sugar solution
D. A very weak salt solution
E. Distilled water

Question 85:

• JAMB 1978

A farmer X working in a swamp did not eat any food nor drink any water. Which of this diseases can he not contact

A. Cholera
B. Bilharzia
C. River blindness
D. Malaria
E. Sleeping sickness