Asked by Lakshmi Rajan | 24th Feb, 2013, 11:56: AM

Expert Answer:

Viruses are not classified in any kingdom yet because they are not really alive. They only show signs of life after they infect a host cell. Virus is a lifeless particle that does not carry out any metabolic functions on its own and cannot reproduce on its own until it invades a living host cell.

Answered by  | 25th Feb, 2013, 09:41: AM

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