The largest cell of the mature embryo sac is

The nutritive tissue present in the ovule is called

In angiosperms, the female gametophyte is known as the .........

What do '$S$' and '$T$' represent in the given figure?

Choose the correct sentences:
$(i)$ The gynoecium represents the female reproductive part of the flower.
$(ii)$ Ovule is located in the anther.
$(iii)$ Each pistil has three parts: the stigma,style,and ovary.
$(iv)$ The uppermost part of the gynoecium is the anther.

The ploidy level of nucellus and female gametophyte respectively is