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Biology Past Questions and Answers

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Biology Questions

Question 4206:

Tooth decay is usually caused by _____________

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A Undigested and absorbed food
B Eating a limited amount of sweetened food.
C The bacteria ín the mouth that metabolize sugar to acids
D Eating a lot of proteinous foods

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Question 4207:

The conversion of ammonium salts into nitrates is called ____________

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A Putrefaction
B Denitrification
C Fixation
D Nitrification

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Question 4208:

The salinity of a brackish habitat ____________

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A Increases immediately after rainfall
B Increases at the end of the rain
C Decreases with an increase in the number of organisms
D Increases during the dry season

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Question 4209:

If 90 ants are found in a field with a total area of 100 m. what is the population density of the ants?

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A 0.09
B 0.90
C 9.00
D 90.00

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Question 4210:

The essential parts of the flower are labelled ___________

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

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