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In the seeds of cereals, the outer covering of endosperm separates the embryo by a protein-rich layer called:

Endosperm, Embryo, Seed
NEET 2025 PYQ
1

Coleoptile

2

Coleorhiza

3

Integument

4

Aleurone layer

Solution:

In the seeds of cereals (monocotyledonous seeds), the endosperm is separated from the embryo by a distinct layer called the aleurone layer. This layer is typically single-layered and rich in proteins. It plays a crucial role in seed germination by secreting enzymes like amylase, which break down the stored food (starch) in the endosperm.

  • (1) Coleoptile: This is a protective sheath that encloses the plumule (embryonic shoot) in monocot seeds.

  • (2) Coleorhiza: This is a protective sheath that encloses the radicle (embryonic root) in monocot seeds.

  • (3) Integument: These are the protective layers of the ovule that develop into the seed coat after fertilization.

Therefore, the correct answer is the aleurone layer.

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