In order to obtain virus-free plants through tissue culture, the best method is:

In tissue culture experiments using tobacco callus,it was observed that when the culture medium contains $2 \ ppm$ of $IAA$ and $2 \ ppm$ of kinetin,an undifferentiated mass of callus is produced. If the ratio of kinetin to $IAA$ is increased,what will happen?

The inherent capacity of a cell to regenerate a new whole organism is called

In tissue culture,roots can be induced by

Which of the following cultures is used in interspecific hybridization where the endosperm of the hybrid seed degenerates at an early stage?

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.