Here's why:

* Seed coat: The seed coat is a tough, protective outer layer that surrounds the embryo and its food supply (endosperm). It acts as a barrier against:

* Physical damage: It protects the embryo from being crushed or broken.

* Desiccation (drying out): It helps prevent moisture loss, which is crucial for the embryo's survival.

* Pathogens and pests: It provides a barrier against harmful organisms.

* Other structures: While the seed coat is the primary protective layer, other structures also contribute:

* Endosperm: The food supply stored within the seed provides nourishment for the embryo during germination.

* Fruit: In some plants, the fruit develops around the seed, offering additional protection and aiding in seed dispersal.

The seed coat is a vital adaptation that allows plants to reproduce and disperse their offspring effectively.