Identify the given figure.

An extreme example of latency in which $DNA$ of the phage is integrated with the $DNA$ of the host cell chromosome is:

Which of the following structures helps in the respiration of lichens?

Which of the following contains a helical $RNA$ strand and capsomeres?

Prions are $-$

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.