Jamb Biology Past Questions and Answers

Question 716:

• JAMB 1991

Which of the following can bring about the greatest increase in the rate of transpiration?

A. Increased humidity
B. Reduced temperature
C. Reduced wind speed
D. Reduced humidity

Question 717:

• JAMB 1991

After 30 minutes, the level of sugar solution in the above figure will

A. Rise in x only
B. Rise in Y only
C. Be the same in X and Y
D. Fall in Y

Question 718:

• JAMB 1991

The process by which water moves from X to Y through the semi-permeable membrane is called

A. Diffusion
B. Osmosis
C. Active diffusion
D. Osmoregulation

Question 719:

• JAMB 1991

Fibrinogen and prothrombin play important roles in the

A. Deamination of proteins
B. Clotting of blood
C. Detoxication of substance
D. Storage of vitamins

Question 720:

• JAMB 1991

Deoxygenation blood flows into the right and left lungs through the

A. Pulmonary vein
B. Vena cava
C. Pulmonary artery
D. Subclavian vein