Which of the following statements about flowering plants is TRUE?
A. A short-day plant requires nights longer than a certain critical period to trigger flowering.
B. A long-day plant requires long days alternating with short days.
C. A short-day plant requires daylight of short wavelengths.
D. A long-day plant requires long wavelengths during the night.
E. A long-day plant requires nights shorter than a certain critical period to inhibit flowering.
Answer: A
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