Class 11 Biology Plant Physiology Plant Growth and Development



When the dark period of short day plants is interrupted by a brief exposure of light, then the plant
(a)
Flowering will be delayed
(b)
Flower immediately
(c)
Give more flowers
(d)
Turn into a long day plant
Correct answer: (a) 
Solution: 
 For short day plants it is necessary to have an uninterrupted long dark period after a short day. A brief interruption of dark period with light nullifies the effect of long night resulting in failed or delayed flowering in plants.
So, the correct answer is 'flowering will be delayed'

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plant growth and development
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anatomy of flowering plants
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