The fusion of male and female gametes is called:

In angiosperms,the haploid,diploid,and triploid structures of a fertilized embryo sac sequentially are:

In angiospermic fertilisation,one male gamete fuses with the egg to form $A$,and this event is called $B$. Identify $A$ and $B$ and choose the correct option.

In flowering plants,the zygote is formed:

The number of gametes taking part in double fertilization is $:-$

Give scientific reasons: Two types of fusions,syngamy and triple fusion,take place in the embryo sac.