$A$ cybrid is a hybrid carrying

Viral infection is usually absent in

Choose the correct option for the recovery of healthy plants from diseased plants.

Virus-free plants can be obtained through $-$

Plants are more rapidly manipulated by genetic engineering than animals due to:

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?