The outer covering of bean seed is hard and tough. It is known as seed coat and test. The small hole is present in the test for the absorption of water. This small hole is called micropyle. The tiny plant is present onside the seed which is called embryo. The embryo of seed consists of following parts.
Radical: It is a tiny root. Plumule: It is a tiny shot.
Cotyledons: There are two cotyledons which contain store food for embryo.