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NEET Practice Questions (MCQs) with Answers & Solutions

Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

All Physics Chemistry Botany Zoology

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For keeping stomata open, besides Kd₊d ions the guard cells require a constant supply of

A. ABA B. ATP C. Organic acid D. Protons

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Transpiration is a process related to

A. Osmosis B. Diffusion C. Activated transport D. Facilitated diffusion

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Rate of transpiration is inversely related to

A. Humidity B. Light C. Temperature D. Water

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Scoto active movement of stomata is that

A. Stomata open at night B. Stomata open during day C. Stomata close at night D. Stomata open both during day and night

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The most effective light for stomatal opening is

A. Yellow B. Green C. Red D. Blue

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During high wind velocity, the stomata

A. open more widely B. Close down C. Remain unaffected D. Remain unaffected but lose more water due to mass action

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Cobalt chloride is blue in dry state. In contact with moisture, it turns in to

A. Yellow B. Pink C. Red D. Green

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The movement of water is along

A. Turgor gradient B. DPD gradient C. Diffusion gradient D. Osmotic gradient

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As absorbed water passes towards vascular cylinder, it must enter the cytoplasm of

A. Pericycle cells B. Endodermalcells C. Cortical cells D. Xylem parenchyma

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Water tightly held to soil particles is called (EAMCET 1996)

A. Bound water B. Capillary water C. Hygroscopic water D. Runaway water

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