Pollen extract stimulates the formation of fruit in the unpollinated carpel because the extract contains the following hormone:

Match column $I$ with column $II$ and select the correct option using the codes given below.

Column-$I$	Column-$II$
$(A)$ Pistils fused together	$(i)$ Gametogenesis
$(B)$ Formation of gametes	$(ii)$ Pistillate
$(C)$ Hyphae of higher Ascomycetes	$(iii)$ Syncarpous
$(D)$ Unisexual female flower	$(iv)$ Dikaryotic

In angiosperms,microsporogenesis and megasporogenesis are . . . . . . .

Given below are two statements:
Statement $I$: Cleistogamous flowers are invariably autogamous.
Statement $II$: Cleistogamy is disadvantageous as there is no chance for cross-pollination.
In the light of the above statements,choose the correct answer from the options given below:

Bananas are seedless because they

In an embryo sac,the $n, 2n, 3n$ conditions are respectively found in: