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Grade: 10
        
Are guard cells open at night ?
2 years ago

Answers : (3)

Adarsh
734 Points
							
Guard cells usually open at the time when the plant is performing photosynthesis. So guard cells are open at day as there is sunlight for doing photosynthesis.
But guard cells are closed at night as there is no sunlight for doing photosynthesis.
 
Please approve if my answer finds useful.
2 years ago
Priyanka
24 Points
							But in some other websites it is given that they are open at night too, as  they are still breathing at night too......So which is TRUE??
						
2 years ago
Priyanka
24 Points
							But in some other websites it is given that they are open at night too, as  they are still breathing at night too......So which is TRUE??
						
2 years ago
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