EVERYDAY SCIENCE

Detailed explanation-1: -cotyledon, seed leaf within the embryo of a seed. Cotyledons help supply the nutrition a plant embryo needs to germinate and become established as a photosynthetic organism and may themselves be a source of nutritional reserves or may aid the embryo in metabolizing nutrition stored elsewhere in the seed.

Detailed explanation-2: -germination, the sprouting of a seed, spore, or other reproductive body, usually after a period of dormancy.

Detailed explanation-3: -Cotyledon is a significant part of plant embryo within the seed. It stores food materials that are supplied to the seeds at the time of germination. After germination the cotyledons become the first leaf of the seedling. When the seedling grows into a small plant with new leaves, the cotyledon dries up and shed down.

Detailed explanation-4: -During germination, the plant draws on the nutrient reserves in the endosperm or cotyledons. Interactions between the embryo and endosperm in monocots use gibberellin as a signal to trigger the breakdown of starch into sugar. As the shoot reaches the surface, the differentiation of chloroplasts is triggered by light.

Detailed explanation-5: -They contain reserve food material that provides nourishment to the developing seedling. The function of Cotyledons is to store food for the growing embryo.