Which part of a seed shown in the given figure indicates the future root?

During seed germination,which part of the seed gram grows into the root system?

$A$ type of seed germination in which the epicotyl region of the embryo elongates rapidly to pull the plumule out of the soil surface is called . . . . . . germination.

Identify $X$ in the given figure of a maize grain.

Identify the part of the seed from the given figure which is destined to form the root when the seed germinates.

Cotyledons and testa respectively are edible parts in