What is the undifferentiated mass of cells in tissue culture called?

In tissue culture technique,morphogenic differentiation of shoot and root is controlled by the interaction and ratio of . . . . . . .

Assertion : In plant tissue culture,somatic embryos can be induced from any plant cell.
Reason : Any viable plant cell can differentiate into somatic embryos.

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

The hybrid produced by cytoplasmic fusion is called:

Shoot tip culture is preferred for the international exchange of germplasm because...