What is meant by a dormant callus?

Which method can be used to recover healthy plants from diseased plants?

Assertion $A$: Growth is faster in suspension culture compared to callus culture.
Reason $R$: Agitating the culture in the medium using a rotary shaker facilitates the mixing of nutrients and gas exchange.

In plant biotechnology,$PEG$ is used in

Which option represents the correct sequence of events during callus culture?

In the suspension culture method,how are the cell aggregates maintained in the liquid medium?