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Biology Past Questions and Answers

Waec Biology Questions

Question 271:

Which of the following mineral salts is a trace element?

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A Zinc
B CArbon
C Hydrogen
D Potassium
E Calcium

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Question 272:

Which of the following organisms reduces nitrates in the soil to gaseous nitrogen?

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A Euglena
B Protozoan
C Denitrifying bacterium
D Parasitic mould
E Nitrifying bacterium

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Question 273:

The process whereby microorganisms can convert atmospheric nitrogen into nitrogenous compound is
known as

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A Nitrogen cycle
B Nitrogen fixation
C Denitrification
D Putrefaction
E Decomposition

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Question 274:

What is the function of the part labelled ll?

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A Attraction of insects
B Secretion of nectar
C Protection of the stigma
D Formation of fruit wall
E Attachment of flower to the shoot.

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Question 275:

The function of the part labelled l is to

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A Receive pollen grains
B Produce nectar
C Store the pollen grains
D Store the ovules
E Produce the male gametes

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