NEET BIOLOGY

Detailed explanation-1: -… 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 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: -Seed coat treatment These treatments make a hard seed coat permeable to water or gases either by softening or cracking. This process is called scarification. The treatment can be either chemical or physical in nature.

Detailed explanation-4: -Dormancy of trees can be divided arbitrarily into three phases: early rest, winter rest, and after-rest. Each of these phases is marked by a distinct set of physiological processes. The transition between the three phases is gradual.

Detailed explanation-5: -Seed dormancy has been defined as the incapacity of a viable seed to germinate under favorable conditions (Bewley, 1997; Finch-Savage and Leubner–Metzger, 2006).