Stomata in angiosperms open and close due to

Their genetic constitution

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Effect of hormones

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Change of turgor pressure in guards cells

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Pressure of gases inside the leaves

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Solution

The correct option is C Change of turgor pressure in guards cells
Changes in turgidity of guard cells, regulate the opening and closing of stomata. When guard cells are turgid, stomatal pore opens and when guard cells are flaccid stomatal pore closes.

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