Which nucleic acid is present in viruses?

Statement $X$: Lichens are composed of two main components. Statement $Y$: In lichens,the phycobiont is the heterotrophic component and the mycobiont is the autotrophic component.

Select the correct statement.

Which of the following statements is not correct for viruses?

The total number of $RNA$ strands in an animal virus is:

Absence of respiration is what type of character of a virus?