The treatment that is most likely to cause cocklebur, a short-day plant, to flower is
A) 12 hours of light and 7 hours of darkness.
B) 12 hours of light and 8 hours of darkness.
C) 12 hours of light and 10 hours of darkness.
D) 12 hours of light and 10 hours of darkness, with exposure to red light for 30 minutes in the middle of the dark period.
E) 12 hours of light with exposure to 10 minutes of darkness in the middle of the light period, and 8 hours of darkness.
Correct Answer:
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