NEET BIOLOGY

Detailed explanation-1: -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-2: -The seed coat has two layers. The outer layer is thick and known as the testa. The inner layer is thin and known as tegmen. A thick seed coat protects the seed from sunlight and water.

Detailed explanation-3: -The thick outer layer is known as the testa. Tegmen is the name for the thin inner layer. Hence, Seed coat, endosperm, and embryo are the three components of a plant seed. The seed coat protects the seed from harm caused by physical, mechanical, temperature, and water.

Detailed explanation-4: -Seeds of most of the plants are found in their fruits. Fruits of the plants protect the seeds and also help in seed dispersal.

Detailed explanation-5: -Amniotic sac. The sac is filled with liquid made by the fetus (amniotic fluid) and the membrane that covers the fetal side of the placenta (amnion). This protects the fetus from injury.