RAJASTHAN PMT Rajasthan - PMT Solved Paper-2007

  • question_answer
    Opening and closing of stomata is due to

    A)  hormonal change in guard cells

    B)  change in turgor pressure of guard cells

    C)  gaseous exchange         

    D)  respiration

    Correct Answer: B

    Solution :

    When the guard cells become turgid, the stomata open. On the other hand, if the guard cells lost water, these become flaccid, the inner walls sag and the pore closes.


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