In somatic hybridization technique,the material generally used is

By tissue culture,an indefinite number of plants from a small amount of parental tissue can be obtained. This technique is of great economic importance as

Read the following statements:
$I.$ Colostrum is recommended for newborns because it is rich in antigens.
$II.$ Chikungunya is caused by a Gram-negative bacterium.
$III.$ Tissue culture has proved useful in obtaining virus-free plants.
$IV.$ Beer is manufactured by the distillation of fermented grapes.
How many of the statement$(s)$ is/are correct?

In the initial stages of protoplast culture,sorbitol or mannitol is added:

Culturing plant tissues or organs in a laboratory is known as .......

In suspension culture,callus is suspended in a liquid medium containing which of the following?