Question

What is a virus??? ...????

Answer 1

Answer:

Virus: A microorganism that is smaller than a bacterium that cannot grow or reproduce apart from a living cell. A virus invades living cells and uses their chemical machinery to keep itself alive and to replicate itself. ... Viruses may contain either DNA or RNA as their genetic material.

Answer 2

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Viruses are non-cellular, microscopic infectious agents that can only replicate inside a host cell. In a nutshell, a virus is a non-cellular, infectious entity made up of genetic material and protein that can invade and reproduce only within the living cells of bacteria, plants and animals.