What is the process of fruit formation without fertilization called?

Differentiate between:
$(a)$ Hypocotyl and epicotyl;
$(b)$ Coleoptile and coleorhiza;
$(c)$ Integument and testa;
$(d)$ Perisperm and pericarp.

Statement-$X$: The seeds of some plants like orchids do not contain stored food.
Statement-$Y$: The embryo present in their seeds is extracted and grown in a culture medium.

Perisperm is the ...... .

An example of a naturally occurring parthenocarpic fruit is

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