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JIPMER2013ZoologyOrganisms and Populations

Which of the following plant keeps its stomata open during night and closed during the day?

Options

  1. AOrchid
  2. BCactus
  3. CTea
  4. DWheat

Correct answer

B. Cactus

Step-by-step solution

Scotoactive mechanism of opening of stomata is seen in fleshy xerophytes like Opuntia, cactus, etc. They keep their stomata open at night and closed during daytimes.

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