On what basis are the three types of lichens classified?

Assertion $(A)$: The capsid of a virus is made up of many small subunits called capsomeres.
Reason $(R)$: Viruses exhibit active and living behavior in a virus-free state.

The microorganism shown in the given figure infects which of the following?

Which of the following is the function of the fungal component in the structure of a lichen?

Which of the following is correct about viroids?

Viruses are composed of: