Question

Diagram of structure of a seed(monocot and dicot).Explain it.​

Answer 1

Dicot seed,

Peas, almonds and cashews are examples of dicotyledons or dicot seeds.

Dicotyledons are also known as dicots. They are the groups into which all the flowering plants or angiosperms were formerly divided. The name dicotyledons refer to the seed having two embryonic cotyledons. There are around 200,000 species of dicotyledons discovered till date.

The one which forms the shoot tip is called plumule and the portion at the lower end which forms the root tip is called the radicle. The whole content is enclosed within a protective cover called the seed coat. The seed coat is made up of an outer layer called testa and an inner layer called tegmen. Moreover, the seed is attached to the fruit through a structure called hilum.

Monoct seed,

Corn, wheat and rice, are examples of monocot seeds or monocotyledons

Embryos of a monocotyledonous seed possess only one large cotyledon called scutellum. The scutellum is generally shield-shaped and is located laterally towards a side of the embryo axis. As in dicotyledons, the embryo axis of monocotyledons possesses a shoot tip, plumule, enclosed in a sheath called coleoptile and a root tip, radicle, enclosed in coleorhiza. In a monocotyledonous seed, the endosperm is covered by a proteinous layer called aleurone layer.