Which of the following substances is $NOT$ used for the formation and maintenance of callus in plant tissue culture?

Which two parts of different plants can be fused for the formation of a new plant in somatic hybridisation?

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 statements is consistent with the process of plant tissue culture?

Micropropagation is a technique for production of

The culture medium (nutrient medium) can be referred to as a 'highly enriched laboratory soil'. Justify the statement.