AP BIOLOGY

Detailed explanation-1: -The outer covering of the seed is known as the seed coat. It develops from the integument of the ovule. The outer layer is called testa and the inner layer is called tegmen. The seed coat protects the seed and its other parts.

Detailed explanation-2: -The testa of higher plant seeds protects the embryo against adverse environmental conditions. Its role is assumed mainly by controlling germination through dormancy imposition and by limiting the detrimental activity of physical and biological agents during seed storage.

Detailed explanation-3: -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.

Detailed explanation-4: -The outer covering of a seed is called the seed coat. Seed coats help protect the embryo from injury and also from drying out. Seed coats can be thin and soft as in beans or thick and hard as in locust or coconut seeds.

Detailed explanation-5: -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.