Stomata opens during day because the guard cells have

Options :
  1. outer walls thin
  2. kidney shape
  3. chlorophyll
  4. large nuclei
Answer and Explanation :-

Answer: Option 1

Explanation:

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By three methods we may learn wisdom: First, by reflection, which is noblest Second, by imitation, which is easiest and third by experience, which is the bitterest.
-Confucius