Biology for IGCSE & O level - Transport In Plants (Section 5 - No. 45)
How does a plant regulate the opening and closing of stomata?
By the concentration of sugars in the guard cells.
By the turgor pressure of the guard cells.
By the amount of lignin in the guard cells.
By the size of the mesophyll cells.
Explanation
The guard cells open and close the stomata, which is influenced by changes in their turgor pressure.
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