Perisperm is $:-$

Which of the following develops into a seed after fertilization?

Which is the oldest seed known?

The formation of fruit without fertilization is known as:

Presence of an impermeable coating around fruits and seeds and small or large air cavities is a characteristic feature of:

Provide the appropriate terms for the following analogies:
$(i)$ In Gymnosperms,Zygote : Embryo :: Ovule : ...
$(ii)$ In Angiosperms,Ovule : Seed :: Ovary : ...