NEET Biology Plant Growth and Development / पौधे की वृद्धि और विकास Question Bank ABA and Other Growth Regulators

  • question_answer
    Abscisic acid treatment results in [CBSE PMT 1991]

    A) Leaf expansion

    B) Stem elongation

    C) Stomatal closure

    D) Root elongation

    Correct Answer: C

    Solution :

    ABA inhibits the H+|K+ exchange and promotes the leakage of maleic acid. The reduction of osmotically active solutes would render the guard cells flaccid and keep the stomatal pore closed.


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