Wheat structure is a single seeded fruit, 4 to 10 mm long, consisting of a germ and endosperm enclosed by an epidermis and a seed coat. The fruit coat or pericaprs (45 to 50 um thick) surrounds the seed and adhere closely to the seed coat. The wheat color, depending on the species and other factors is red a to white and is due to material present in the seed coat. Wheat also is classified based on physical characterizes such as red, white soft, hard spring or winter. The outer pericaprs is consist of the epidermis and hypodermis. The epidermis consists of a single layer of cells that from the outer surface of the kernel. On the outer walls of the epidermal cells is the water impervious cuticle. Some epidermal cells at the apex of the kernel are modified to form hairs.