EVERYDAY SCIENCE

Detailed explanation-1: -seed development form the seed coat (testa). The product is a structure in which the embryo is protected from temperature extremes by its state of desiccation and is often guarded from further drying and from mechanical or biological degradation by the seed coats.

Detailed explanation-2: -The outer coat of the seed, whose function is to protect the seed and its contents, is known as a testa. Tegmen: Tegmen is the second protective seed coat present within the testa. Just like the testa, it also protects the seed and its contents.

Detailed explanation-3: -(Science: plant biology) Outer covering of a seed, also called the seed coat, derived from the integument of the ovary.

Detailed explanation-4: -The testa is composed mainly of cellulose and other polysaccharides, lignin, cutin, proteins, phenolic compounds, pigments, waxes, fats and resinous matter, providing the most protection against dam-age (Michniewicz, 1977; Bewley and Black, 1994; Werker, 1997).