Scutellum in a caryopsis representsoutermost layer of endosperm-the place where the seed is attached to rephe-a cotyledon-a sheath that protects the radicle-

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Standard XII

Biology

Dry Fruits

Scutellum in ...

Question

Scutellum in a caryopsis represents

outermost layer of endosperm

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a sheath that protects the radicle

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the place where the seed is attached to rephe

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a cotyledon

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Solution

The correct option is D
a cotyledon

Caryopsis fruit is the characteristic feature of family gramineae which is a monocot family. Monocots possess a single large cotyledon called scutellum. The outermost layer of the endosperm is called the aleurone layer in monocots. The sheath covering radicle is called coleorhiza.

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Similar questions

Fill in the blanks :
(a) In bean seeds, ___ grows faster and the seeds are brought___ ground.
(b) ___ is a protective layer of radicle and ___ protects the rolled plumule.
(c) A seed is protected by ___ and ___
(d) Seeds absorb water through ___ which also helps in the diffusion of respiratory gases.
(e) Rice, wheat, and maize are rich in ___ food.

What are the functions of the following in a seed?
(a) Seed coat
(b) Micropyle
(c) Cotyledons
(d) Radicle
(e) Plumule

Q. Select the incorrect statements.
A. Endosperm is formed as a result of syngamy.
B. In dicotyledonous embryo the root tip is covered with a root cap.
C. In monocotyledonous embryo radicle and root cap are enclosed in an sheath called coleoptile.
D. The cotyledon of grasses is known as scutellum.

Q. Read the assertion and reason carefully to mark the correct option in question.

Assertion: In monocotyledonous seed, a single shield-shaped cotyledon called scutellum and a short axis with a plumule and radicle are present.

Reason: The plumule and radicle are enclosed in sheaths which are called coleorhiza and coleoptile respectively.

Q. Select the correct statement/statements.
I. The seed coat of dicots is distinguished into testa and tegmen.
II. Seeds remain attached to the fruit through micropyle.
III. Radicle and plumule are parts of cotyledon.
IV. Bean and pea are endospermic seeds.
V. Scutellum is the characteristic feature of monocot seed.

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