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      Question

      Photoperiodism refers to the plant's response

      to:
      A Light intensity Correct Answer Incorrect Answer
      B Light duration Correct Answer Incorrect Answer
      C Light color Correct Answer Incorrect Answer
      D Temperature fluctuations Correct Answer Incorrect Answer

      Solution

      Many greenhouse flowers require specific day lengths to trigger flowering. This physiological reaction allows growers to schedule blooms for specific holidays or markets.

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