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Biology Past Questions and Answers

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Waec Biology Questions

Question 1381:

Which of the following methods does not make water fit for drinking?

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A Addition of chlorine
B Boiling
C Distillation
D Addition of alum

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Question 1382:

Vaccination results in

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A Aiding red blood cells to carry more oxygen
B Production of antibodies which destroy toxins of germs
C Arresting excessive bleeding
D Production of white blood cells which engulf and digest bacteria.

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Question 1383:

Leguminous crops are incorporated into crop rotation in order to

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A Improve aeration of the soil.
B Promote nitrogen fixation
C Increase the rate of soil formation
D Improve upon the water holding capacity of the soil

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Question 1384:

Which of the following practices improves crop yield in a clayey soil? Addition of

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A More water and humus
B Lime and humus
C Fertilizers
D Weedicides and fertilizers

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Question 1385:

Which of the following activities promotes forest conservation?

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A Lumbering
B Use of firewood for cooking
C Afforestation
D Production of paper

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