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Biology Past Questions and Answers

Waec Biology Questions

Question 646:

The following are useful effect of micro-organisms except

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

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Question 647:

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

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

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Question 648:

When a mammal respires anaerobically for a long time

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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.

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Question 649:

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

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

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Question 650:

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

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A I
B II
C III
D IV

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