Q. If a plant need 10 hours darkness than identify the condition under which it will flower I. 14 hours day period II. 10 hours dark period III. 9$\frac{1}{2}$ hours dark period IV. 9 hours dark period Choose the correct option
A) I and III
B) II and III
C) I and IV
D) I and II
Explanation
Condition in which the duration of dark period is less than the critical period of time does not promote flowering. Hence, SDP are called dark nigh plants. Even a fraction of second interruption during night could fail the flowering
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.