Question

Why are viruses considered to be nonliving?
A. They do not respond to their environment.
B. They have no genetic material.
C. They cannot obtain energy from their host.
D. They can reproduce only in a host cell.​

Answer 1

Answer:

They have no genetic material.

Answer 2

D. They can reproduce only in a host cell.

Without a host cell, the virus simply can't replicate. Viruses fail the second question for the same reason. Unlike other living organisms that can self-divide, splitting a single cell into two, viruses must 'assemble' themselves by taking control of the host cell, which manufactures and assembles the viral components.