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  4. In a cereal grain, the single cotyledon of an embryo is represented by the

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Q. In a cereal grain, the single cotyledon of an embryo is represented by the

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Solution:

The cotyledons are known as seed leaves, they are attached to the embryonic axis. Dicotyledons typically have two cotyledons & monocotyledons have only one cotyledon. The single shield-shaped cotyledon in grains is known as scutellum.
The scutellum does not contain food & its function is to absorb food from the endosperm & transfer it to the growing parts of the embryo. The plumule consists of the growing tip of the shoot along with few young leaf primordia.
It is covered by a sheath called coleoptile. The radicle which lies at the base of the grain is also covered with a sheath called coleorhiza. The hypocotyl is very short & is represented by a short axis in between radicle and plumule.