Describe the structure of Endospermic and non- endospermic dicot seed?

Answer 1

External Structure (pea seed): hilum, seed coat, micropyle.
Internal Structure: epicotyl, hypocotyl, radicle, and plumule.

The single massive cotyledon is termed the scutellum, while the plumule and radicle are enclosed by protective structures termed the coleoptile and the coleorhiza.

Endospermic seeds are seeds whereby the endosperm is present in the mature seed and serves as food storage organ. Testa and endosperm are the covering layers of the embryo. Non-endospermic seeds are seeds whereby the cotyledons serve as sole food storage organs. During embryo development the cotyledons absorb the food reserves from the endosperm. The endosperm is almost degraded in the mature seed and the embryo is enclosed by the testa.

Answer 2

Dicot Seed Structure

Answer 3

In a non-endospermic seed, the embryo completely fills the seed coat. A good example is a pea seed ... you peel off the seed coat and all that is there is the embryo with its two large cotyledons and the small root/shoot plantlet between them and joined to them.

In an endospermic seed, the embryo is small compared to the volume of the seed, with the rest of the space being occupied by the endosperm. A good example is the wheat seed where the bulk of the seed is endosperm (the starch we use as food) and the embryo is a small shield-shaped thing at one side, the so-called "wheat germ".

Answer 4

Endospermic and non- endospermic seeds

Answer 5

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In dicots that have lost the endosperm, the embryo has no endosperm to be embedded in. They still have a seedcoat for protection.