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Solution


Q.

The opening and closing of stomatal pores depends upon
1 Oxygen  
2 Water in guard cells  
3 Concentration of carbon dioxide in stomata  
4 Temperature  

Ans.

(2)

The entry of water into guard cells aids in the opening of guard cells, the guard cell becomes turgid as a result of this. Water going out from guard cells aids in the closing of guard cells, as a result of this the guard cells become flaccid.