Stomatal opening and closing depends upon changes in turgor pressure of:
(a) Xylem elements
(b) Mesophyll cells
(c) Guard cells
(d) Epidermal cells
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2
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Answer is option c) Guard Cell
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Two highly specialized cells, the guard cells that surround the stomatal pore, are able to integrate environmental and endogenous signals in order to control the stomatal aperture and thereby the gas exchange.
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