Which element has a function in opening and closing of stomata?
Correct answer: A. K
- A. K
- B. Mg
- C. Cu
- D. Fe
Explanation
Potassium (K) is crucial for stomatal function in plants. It opens stomata by entering guard cells, promoting turgidity and pore opening. When potassium exits guard cells, stomata close due to reduced turgor pressure. This regulation enables gas and water vapor exchange through stomata.
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