Explanation:The cotyledons are referred to as seed leaves.It is because they act as the leaves of the seed during the process of germination.As the leaves of plants provide food for the plants, so do the cotyledons provide food for the germinating plant.This is possible because the cotyledons store the necessary food used during this process.The cotyledons act as a food store in plant seeds.Ovules after fertilisation, develop into seeds.A seed is made up of a seed coat and an embryo.The embryo is made up of a radicle, an embryonal axis and one (as in wheat, maize) or two cotyledons (as in gram and pea).The Cotyledons are often fleshy and full of reserved food materials.At the two ends of the embryonal axis are present the radicle and the plumule.In some seeds such as castor, the endosperm formed as a result of double fertilisation is a food storing tissue.In plants such as beans, gram and pea, the endosperm is not present in mature seeds and such seeds are called non-endosperms.