Waec Biology Past Questions and Answers

Question 771:

• WAEC 2002

Study the information below. Use it to answer question below

In an experiment to study the rate of water loss in plants, leaves of a potted plant were treated as follows:
I. Upper surface covered with Vaseline ll. Lower surface covered with Vaseline
III. Both surfaces covered with Vaseline IV. None of the leaf surfaces coveredIndicate in a descending order, the rate of water loss from the leaves

A. I, II, III and IV
B. II, I, III and IV
C. III, II, I and IV
D. IV, I, II and III

Question 772:

• WAEC 2002

The following are methods of measuring plant growth except

A. Determining the fresh and dry weights of the plant
B. Counting the number of fruits produced
C. Measuring the increase in height of the shoot
D. Measuring the length and breadth of a leaf.

Question 773:

• WAEC 2002

Which of the following will ease the friction between the ends of bones in a movable joint?

A. Serum
B. Tissue
C. Blood plasma
D. Synovial fluid.

Question 774:

• WAEC 2002

Diffusion is most effective in living organisms, when the surface area is

A. Large and the thickness is also large
B. Small while the thickness is large
C. Large while the thickness is small
D. The same as its thickness.

Question 775:

• WAEC 2002

The function of the red blood cells is to

A. Engulf invading bacteria
B. Aid in protein formation
C. Transport oxygen to the cells
D. Control blood glucose level