The small living organism which has the outer protein layer and inner genetic material is called a virus. These viruses infect animals and plants both.
A virus can have any of the following as a genetic material:-
The virus can infect the host and take over his genome to replicate his own genetic material. This genetic material has the sequence which causes the infected protein and the infect the host.
Hence, the suitable answer to this question is D, that is:-a virus cannot reproduce on its own and depends on the host cell.
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