NEET Biology Transport In Plants Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

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Transport In Plants Topic Based

Question & Answer Discuss:

Stomata open and close due to

(a) pressure of gases inside the leaves

(b) genetic clock

(c) circadian rhythm

(d) turgor pressure of guard cells.

Answer: (d)

The pressure that develops in a cell due to osmotic diffusion of water inside it, is called turgor pressure. Stomata open and close due to turgor pressure of guard cells. When turgid, they swell and bend outward. As a result, the stomatal aperture opens. When they are flaccid, the tension from the wall is released and the stomatal aperture closes.

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