Which is the best method to obtain virus-free plants through tissue culture?

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

The large number of genetically identical offspring produced by micro-propagation are called . . . . . . .

Which technique can be used to develop seedlings from seeds that have remained dormant for a long time?

Arrange the following steps of somatic hybridisation in a correct sequence.
$A$. Digestion of cell walls.
$B$. Isolation of naked protoplasts.
$C$. Fusion of protoplasts to get hybrid protoplast.
$D$. Isolation of single cells from two different varieties of plants.
$E$. Growing of hybrid protoplast to form a new plant.
Choose the correct answer from the options given below:

Which of the following is absent in the culture medium used for plant tissue culture?