Q.Label the parts of seed.

Seed development is triggered directly by fertilization: the two integuments of the fertilized ovule persist and become the seed coat (an outer testa and, in some seeds, an inner tegmen), while in a few genera the nucellus itself persists as a papery perisperm. Seeds are described as endospermic/albuminous if the embryo consumes only part of the endosperm reserve, leaving it prominent at maturity (castor, coconut, maize), or non-endospermic/ex-albuminous if the embryo consumes the endosperm completely during development (pea, bean), in which case the cotyledons often take over food storage. The micropyle persists as a small pore allowing water and oxygen entry during germination. In parallel, hormonal signals from the developing seeds trigger the ovary to differentiate into the fruit, …