true or false. [1 M]

Question 11 Mark

Oxygen alone constitutes $78\%$ of air.

Answer

False

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Question 21 Mark

Salt is used as a food preservative.

Answer

True

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Question 31 Mark

Jellies, jams and squashes are preserved by adding vinegar to them.

Answer

False

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Question 41 Mark

A fungi is used in the production of alcohol.

Answer

True

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Question 51 Mark

Amoebic dysentery is caused by algae.

Answer

False

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Question 61 Mark

Algae tend to develop on wet surfaces.

Answer

True

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Question 71 Mark

Anabaena is listed in the category of algae.

Answer

False

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Question 81 Mark

Viruses are the most useful microbes.

Answer

False

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Question 91 Mark

Microorganisms are found in large number around us.

Answer

True

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Question 101 Mark

Bacteria have an organised nucleus.

Answer

False

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Question 111 Mark

An instrument called microscope is required to see the microorganisms.

Answer

True

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Question 121 Mark

All the microorganisms are harmful.

Answer

False

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Question 131 Mark

Microbiology is the science of study of microbes.

Answer

True

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Science true or false. [1 M]

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