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Biology Past Questions and Answers

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Waec Biology Questions

Question 1231:

Which of the following cycles involves the process of precipitation and transpiration?

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A Water cycle
B Carbon cycle
C Nitrogen cycle
D Oxygen cycle

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Question 1232:

The mesophyll layer of a leaf consists of

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A Wax and cutin
B Cells with lignified walls
C Irregularly shaped collenchyma cells.
D Photosynthetic parenchyma cells.

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Question 1233:

Which of the following treatments would increase the rate of transpiration in a potted plant?

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A Placing it in a cold room
B Placing it under a fan in a room
C Putting it in a cupboard
D Smearing grease on the lower surface of the leaves

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Question 1234:

Pepsin is secreted as an inactive precursor called pepsinogen because

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A Pepsin as an enzyme is quickly destroyed by the alkaline food from the mouth
B . all digestive enzymes pass through a precursor stage
C Pepsin is a proteolytic enzyme and might attack the stomach tissues
D Pepsin is not required in large quantities

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Question 1235:

An organism whose source of carbon is inorganic is likely to be a/an

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A Heterotrophic organism
B Autotrophic organism
C Symbiotic organism
D Parasitic organism

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