how are viruses different from bacteria?

a. viruses cannot survive outside a host.

b. viruses are much larger.

c. viruses contain only rna.

d. viruses are prokaryotes.

Viruses cannot survive outside a host.

Explanation:

Viruses are simple non-cellular entities.They contain one or more molecules of either DNA or RNA enclosed in a protein capsid. They show obligatory parasitism and cannot reproduce outside a living host cells. An infectious virus is termed as virion. A virion injects its DNA or RNA into the host cell which in turn is integrated into the host genome. The viral genome is then gets expressed by the host cell.

the answer to your question is b

which

what is a measurement of the earth’s history divided into time periods?

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements