The document discusses different groups of seeds including cereals, pulses, oil seeds, vegetables and fruits. It provides details about the shape and structure, as well as climatic conditions needed for common seeds in each group, such as wheat and rice for cereals, chana and moong for pulses, and groundnut, sunflower and sesame for oil seeds. The seeds are described in terms of their outer brown, white or colored coat and whether they have a single or double cotyledon or embryo inside.