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Question

A single shield-shaped cotyledon of grass is known as

A
tigellum
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B
scutellum
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C
coleoptile
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D
coleorhiza
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Solution

The correct option is B scutellum

Cotyledons are the very first leaves that appear from a germinating seed.

Monocots have only one cotyledon. In the grass family, the shield-shaped cotyledon is called scutellum. It is situated towards the lateral side of the embryonal axis.

The main axis of the embryo is known as tigellum. It helps in distinguishing the root and the shoot of the plant. The part of the tigellum, which is found above the point of attachment of the cotyledon, is called epicotyl, which develops into the shoot. The part below is called hypocotyl and develops into the root.

In monocots, the sheath that protects the young shoot tip of the germinating seed is called coleoptile.

In monocots, the sheath that protects the young root tip of the germinating seed is called coleorhiza.


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