Viruses contain DNA or RNA, but lack genes necessary for metabolism and reproduction. Why are viruses not considered to be alive?

A. Viruses are unable to reproduce independently of a host.
B. Viruses do not contain nucleic acids.
C. Viruses do not contain internal organelles.
D. Viruses do not have the ability to evolve in their environment.


Answer: A

Biology & Microbiology

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