Ncert Exercises & Solutions

Viruses are non-cellular organisms, but replicate themselves once they infect the host cell. To which of the following kingdom do viruses belong to?
1. Monera

2. Protista

3. Fungi

4. -None of these

(d) In five kingdom classification of Whittaker, non-cellular organisms like viruses and viroids are not mentioned. Viruses did not find a place in classification since they are not truly ‘living’ and hence, they are considered as non-cellular.

Monera includes all unicellular prokaryotes called bacteria in which viruses can not be
included.
Protista includes all eukaryotic unicellular plant and animals and fungi are
heterotrophic /parasitic, cellular organism devoid of chlorophyll.

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