ICSE Class 9 Answered

Structure of a dicot seed:

• A dicotyledonous seed is covered by a seed coat.
• A seed coat is made of two layers—an outer testa and an inner tegmen.
• There is a scar on the seed coat called hilum. Through the hilum, the developing seeds are attached to the fruit.
• A micropyle is the small pore present just above the hilum.
• An embryo is enclosed by the seed coat.
• The embryo has an embryonal axis and two cotyledons.
• The cotyledons are fleshy, and they serve as the food reserves for the developing embryo.
• At the two ends of the embryonal axis are the radicle and the plumule.