A mature seed consists of two essential parts – the seed coat and the embryo. Seed coat: The outer covering of the seed is known as seed coat. The seed coat develops from the integument of the ovules. The seed coat is made of two layers – the outer layer is called the testa and the inner layer is called tegmen.
Try researching the discovery of microscopes and their impact on scientific discoveries, including cells!!!
C)set maximum contaminant levels for pollutants in drinking water