The critical day length of a short-day plant is:
Correct answer: D. 15 ½ hours
- A. 11:00 hours
- B. 15:00 hours
- C. 11 ½ Hours
- D. 15 ½ hours
Explanation
Critical day length is the length of the light period in a 24-hour cycle required to inhibit the flowering of short-day plants. For short-day plants, this is 15 and a half hours (FACT). Short-day plants initiate flowering when the day length becomes shorter than a certain critical period.
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