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NEET Practice Questions (MCQs) with Answers & Solutions

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All Physics Chemistry Botany Zoology

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Function of sieve tubes are controlled by

A. Nucleus of sieve tube B. Nucleus of companion cell C. Nucleus of parenchyma D. No function as they are dead cells

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Explanation

P-88 , PARA-1

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The companion cells help in maintaining the ________ in the sieve tube.

A. Temperature gradient B. Cellulose gradient C. Pressure gradient D. Ion gradient

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Explanation

P-88 , PARA-1

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Resin, latex and mucilage are found in

A. Phloem parenchyma B. Xylem parenchyma C. Phloem pits D. None of the above

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Explanation

P-88 , PARA-1

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Phloem parenchyma is absent in most of the

A. Dicotyledons B. Monocotyledons C. Desert plants D. None of the above

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Explanation

P-88 , PARA-1

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Which component of Jute, Flax and Hemp are commonly used?

A. Phloem fibres B. Xylem fibres C. Sieve tubes D. All of the above

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Explanation

P-88 , PARA-1

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Epidermis in plant is generally

A. Single layered B. Double layered C. Triple layered D. Present in patches

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Explanation

P-89 , PARA-1

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Epidermal cells are parenchymatous with __________ amount of cytoplasm lining, the cell wall and _______ vacuole.

A. Small, large B. Large, small C. Small, no D. Large, no

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Explanation

P-89 , PARA-1

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A waxy thick layer which prevent water loss is

A. Cuticle B. Guard cell C. Epidermis D. Stomata

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Explanation

P-89 , PARA-1

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Cuticle is not found in

A. Stem B. Branches C. Leaves D. Roots

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Explanation

P-89 , PARA-1

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The stomatal aperture, guard cell and the surrounding subsidiary cells are together called________.

A. Stomata B. Stomatal apparatus C. Stomatal aperture D. Cuticle

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Explanation

P-89 , PARA-1

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