NEET BIOLOGY

Detailed explanation-1: -Assertion :The outermost covering of a dicotyledonous seed is the seed coat. Reason: The seed coat has two layers-outer testa and inner hilum.

Detailed explanation-2: -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-3: -A hard seed coat protects the seed not only from mechanical stress but also from microorganism invasion and from temperature and humidity fluctuations during storage. Phenolic compounds in the seed coat contribute to seed hardness and inhibition of microorganism growth.

Detailed explanation-4: -Seed coat is the tough layer of a seed. Seed coat helps to protect the embryo from injury and also from drying out.

Detailed explanation-5: -During this process, they undergo many changes in the appearance and texture. The seed coat in mature seeds can be a paper-thin layer (groundnut, maize or peas) or it may become thick and hard (coconut, honey locust).