DENDROLOGY

Detailed explanation-1: -reserve food. Cotyledons of seed are units to store reserve food in the form of fats and proteins which are used by young embryo after germination, during its initial growth as a seedling.

Detailed explanation-2: -cotyledon. 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-3: -The cotyledons are referred to as seed leaves.