The hybrid produced by cytoplasmic fusion is called:

Pollen grains of a plant whose $2n = 28$ are cultured to get callus by tissue culture method. What would be the number of chromosomes in the cells of the callus?

Which of the following options represents the correct matching for the given columns?

Column-$I$	Column-$II$
$(i)$ Callus culture	$(A)$ Hybrid embryo recovery
$(ii)$ Suspension culture	$(B)$ Differentiated mass
$(iii)$ Embryo culture	$(C)$ Undifferentiated mass

$S$ - Statement: An undifferentiated mass of cells in a culture is called callus.
$R$ - Reason: Auxin and cytokinin are added as growth regulators in the culture medium for callus induction.

Micropropagation is a technique for the production of

What are the physical barriers of a cell in the protoplast fusion experiment? How are these barriers overcome?