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Question

When stomata open in night only, they are called 
  1. photoactive stomata
  2. scotoactive stomata 
  3. all of these 
  4. hydathode


Solution

The correct option is B scotoactive stomata 
When stomata opens in night only and remains close during daytime, then they are called scotoactive stomata. 

When stomata opens during daytime only and remains close in night, then they are called photoactive stomata.

Hydathode is a type of pore that secretes water through pores in the epidermis or leaf margin. 

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