Biology · Plant Physiology
What directly causes the opening and closing of stomatal pores in plant leaves?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The direct pressure of sunlight on the surface
- 2Changes in the rate of photosynthesis
- 3Swelling and shrinking of guard cells✓
- 4Changes in temperature of the leaf surface
Correct answer
Swelling and shrinking of guard cells
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