The odd one out is:

The male and female reproductive organs of several pteridophytes and gymnosperms are comparable to floral structures of angiosperms. Make an attempt to compare the various reproductive parts of pteridophytes and gymnosperms with reproductive structures of angiosperms.

Choose the odd one with respect to the flowering and fruiting pattern.

What is the ploidy of $MMC$,antipodal cell,central cell,and egg cell,respectively?

In which of the following plants is 'dioecy' observed?

Identify the plant parts that consist of two generations,one within the other:
$(a)$ Pollen grains inside the anther
$(b)$ Germinated pollen grain with two male gametes
$(c)$ Seed inside the fruit
$(d)$ Embryo sac inside the ovule