Which part of the plant is the reproductive organ?

Define the term 'double fertilization in plants'. After fertilization,name the part in each case which develops into $(i)$ the fruit,(ii) the seeds.

The correct sequence of reproductive stages seen in flowering plants is

In the figure,the parts $A$,$B$,and $C$ are sequentially:

Which among the following statements are true for unisexual flowers?
$(i)$ They possess both stamen and pistil.
$(ii)$ They possess either stamen or pistil.
$(iii)$ They exhibit cross-pollination.
$(iv)$ Unisexual flowers possessing only stamens cannot produce fruits.

Length of pollen tube depends on the distance between :