They are smaller than virus.

Identify the organisms shown in the figures $A$,$B$,and $C$:

Assertion $(S)$: Viruses are considered as a link between living and non-living organisms.
Reason $(R)$: Viruses replicate only when they are inside a host cell,whereas they behave as non-living particles in a free state.

Which of the following is a sub-viral agent smaller than a virus?

The genetic material in viruses is

What is the function of the algal component in a lichen?