Waec Biology 2000 Past Questions and Answers

Question 16:

• WAEC 2000

Which of the following structures is not present in the vascular bundles of a dicot stem?

A. Xylem
B. Phloem
C. Lntra-fascicular cambium
D. Inter-fascicular cambium

Question 17:

• WAEC 2000

When a mammal respires anaerobically for a long time

A. Pyruvic acid is convened into acetyl COA
B. More energy is released from fats in the body
C. Lactic acid accumulates in the muscles
D. The Krebs cycle is fully completed.

Question 18:

• WAEC 2000

Which of the labelled structures in the diagram are involved with the entry
of carbondioxide for photosynthesis?

A. I, II and III only
B. I, II, III and VI
C. I, II, V and VI
D. I, II, III, and IV

Question 19:

• WAEC 2000

Which of the labelled structures in the diagram will shrink when plasmolysis
occurs?

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

Question 20:

• WAEC 2000

The condition shown in the above diagram is due to

A. Conversion of starch to sugar
B. Conversion of sugar to starch
C. Excess water in structure labelled I
D. Presence of carbondioxide in the structure labelled I