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

List any two differences between pollination and fertilization.

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.

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

Which among the following statements are true for sexual reproduction in flowering plants?
$(i)$ It requires two types of gametes
$(ii)$ Fertilisation is a compulsory event
$(iii)$ It always results in formation of zygote
$(iv)$ Offspring formed are clones

Length of pollen tube depends on the distance between