Question

what do you mean by the terms : hypocotyl and epicotyl

Answer 1

Hypocotyl is the part of the stem of an embryo plant beneath the stalks of the seed leaves or cotyledons and directly above the root.

An epicotyl is important for the beginning stages of a plant's life. It is the region of a seedling stem above the stalks of the seed leaves of an embryo plant. It grows rapidly, showing hypogeal germination, and extends the stem above the soil surface. Epicotyls also form a hook during hypogeal germination.