A) In some gymnospermic plants only
B) In long day plants under short day conditions
C) In short day plants under long day conditions
D) In day neutral plants under dark conditions
Correct Answer: B
Solution :
When long day plant are grown under short day conditions the gibberellins are produced in insufficient quantities and flowering does not occur. However if the plant is transferred to long day conditions or gibberellin solution is applied to leaves flowering occurs.
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