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    Campbell Biology in Focus
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    Exam 31: Plant Responses to Internal and External Signals
  5. Question
    A Short-Day Plant Will Flower Only When
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A Short-Day Plant Will Flower Only When

Question 66

Question 66

Multiple Choice

A short-day plant will flower only when


A) days are shorter than nights.
B) days are shorter than a certain critical value.
C) nights are shorter than a certain critical value.
D) nights are longer than a certain critical value.

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