Question:
The figure shows photoperiodism. Identify its correct explanation from the following.
The figure shows photoperiodism. Identify its correct explanation from the following.
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A flash of light that interrupts the dark period stops short day plants from flowering.
Updated On: Nov 13, 2026
Short day plants flower
Short day plants do not flower
Long day plants do not flower
Day neutral plants do not flower
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept
The figure shows a light period, a critical dark period and a flash of light given in the dark period.
Step 2: Concept
Short day plants need a continuous dark period longer than the critical length. A flash of light in the dark period breaks it.
Step 3: Result
Because the dark period is interrupted, short day plants do not flower.
Step 4: Compare the options
Long day plants would not be inhibited, so the correct explanation is that short day plants do not flower.
Final Answer:
Short day plants do not flower in the pattern shown. \[ \boxed{\text{(B) }\text{Short day plants do not flower}} \]
The figure shows a light period, a critical dark period and a flash of light given in the dark period.
Step 2: Concept
Short day plants need a continuous dark period longer than the critical length. A flash of light in the dark period breaks it.
Step 3: Result
Because the dark period is interrupted, short day plants do not flower.
Step 4: Compare the options
Long day plants would not be inhibited, so the correct explanation is that short day plants do not flower.
Final Answer:
Short day plants do not flower in the pattern shown. \[ \boxed{\text{(B) }\text{Short day plants do not flower}} \]
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