What is definitive nucleus?

After double fertilizatin the definitive nucleus transfer into-

Fusion of one male gamete with definitive nucleus.

If the number of chromosomes in as endosperm cell is 27, what will be the chromosome number in the definitive nucleus ?

If the number of chromosomes in an endosperm cell is 27 , what will be the chromosome number in the definitive nucleus ?

Fusion of male gamete and definitive nucleus results in the formation of

Fusion of male gamete and definitive nucleus results in the formation of

A: Triple fusion is associated with the sexual reproduction in all spermatophytes r: It is required to form definitive nucleus as nutritive tissue