Q118
General ScienceBiology
A short day plant has a critical day length of 14 hours. It will flower when the day length is
- a.15 hours
- b.18 hours
- c.12 hours
- d.16 hours
Answer: (C) 12 hours
A 'short day plant' (more accurately a long night plant) flowers when the night length exceeds its critical value. If the critical day length is 14 hours, the plant flowers when day length is LESS than 14 hours (i.e., night is longer than 10 hours). Among the options, 12 hours (less than 14) is the only qualifying day length.