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NEET Biology Plant Growth and Development / पौधे की वृद्धि और विकास Question Bank Photoperiodism and Vernalization

  • question_answer
    For short day plants, the critical period is

    A) Light

    B) Dark

    C) Ultraviolet rays

    D) None of the above

    Correct Answer: B

    Solution :

    Critical dark period is that continuous duration of darkness which must be exceed in short day plants and must not be exceeded in long day plants.


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