Dental plaque is composed of bacteria which feed on sugary food which is stuck in our teeth in

tooth decay
tooth loss
milk tooth
permanent tooth
tooth decay  

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Chicken pox is caused by
A. virus
B. bacteria
C. contaminated water
D. food poisoning
Important decomposers which breakdown dead waste and take nutrients from them are
A. bacteria
B. fungi
C. both a and b
D. virus
Different types of cheese are prepared by different kinds of
A. virus
B. bacteria
C. fungi
D. moulds
Microorganisms are
A. tiny
B. big
C. medium
D. larger
E.coli can reproduce and become double in
A. 20 mins
B. 60 mins
C. one hour
D. 2 mins
Viruses cannot be observed under ordinary microscope they are smaller than
A. bacteria
B. amoeba
C. paramecium
D. fungi
Pasteurization helps us to kill
A. micro-organisms
B. fungi
C. virus
D. bacteria

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