Germination of a wheat seed in soil with half the pot removed to show the development of the roots & shoots below the surface. The green embryonic shoot or plumule, is seen here to have grown up through the earth to the surface. This contains chloroplasts which means that it can make food by photosynthesis. There is a tap root growing downwards which was the original embryonic root or radicle, as well as four lateral roots. These hold the plant firmly in the ground & supply it with water and minerals. In some places little hairs project off these roots. These are called root hairs which increase the root's surface area & so speed up the rate at which water can be absorbed.