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Question regarding the gas exchange in plants

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Which statement is correct concerning gas exchange in plants? 

  • If stomata do not allow in enough CO2, the guard cells close.
  • When water is plentiful, the central vacuole of guard cells fills and turgor force on the cell walls increases. The guard cells push against each other opening a pore.
  • The stomata receive hormonal signals from the plant, indicating when they should open and close for gas exchange.
  • When water is scarce, the central vacuole gains water and the turgor force is reduced, causing the pore to close.

Reference no: EM132747473

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