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Question

Which organisms are microscopic and dependent on host organisms for reproduction?


A

Bacteria

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B

Viruses

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C

Protozoa

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D

Algae

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Solution

The correct option is B

Viruses


Viruses are non-cellular microorganisms composed of protein, nucleic acids and lipids. Viruses are considered both living and non-living organisms. They are active inside host cells and reproduce inside them by infecting living cells. Outside a host it is considered non-living as it does not have a cellular machinery of its own.


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