Waec Biology Past Questions and Answers

Question 646:

• WAEC 2000

The following are useful effect of micro-organisms except

A. Production of vaccines
B. Curing of tobacco
C. Tanning of leather
D. Decay of meat

Question 647:

• 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 648:

• 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 649:

• 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 650:

• WAEC 2000

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

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