What function does the seed coat of a bean do?

The seed coat of a bean serves several important functions, primarily protecting the embryo and the stored nutrients within the seed from physical damage, pathogens, and desiccation. It acts as a barrier against environmental factors, ensuring that the seed remains viable until conditions are suitable for germination. Additionally, the seed coat can influence the seed's water absorption and germination timing, as it can be permeable or impermeable to moisture.