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In short-day plants, flowering is induce...

In short-day plants, flowering is induced by

A

long nights

B

photoperiods less than 12 h

C

photoperiods shorter than intial value and uninterrupted long night

D

short photoperiods and interrupted long nights

Text Solution

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The correct Answer is:
C
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Assertion: Dark period play more important part in flowering than light period. Reason : Flowering occurs in short-day plant if the dark period is interrupted by light break.

ARIHANT NEET-PLANT GROWTH AND DEVELOPMENT -CHAPTER EXERCISES ( TAKING IT TOGETHER )
  1. The flowering respones of plants can be changed by

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  2. In many plants the change over from vegetative to reproductive phase t...

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  3. In short-day plants, flowering is induced by

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  4. When the dark period of short day plants is intrrupted by a brief expo...

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  5. Plants which daily require shorter period of darkness for flowering ar...

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  6. If a plant produces flower on exposure to alternating exposures of 4 h...

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  7. In short day plants, flowering is inhibited by

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  8. The long-day plants require

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  9. A long day plant flowers only when it is exposed to

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  10. Types of plants that come to flower after exposure to short photoperio...

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  11. If a short-day plant is grown under conditions of long nights and sho...

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  12. If a long-day plant is grown under conditions of long nights and shor...

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  13. The region of the spectrum, which does not cause photoperiodic inducti...

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  14. Photoperiodic stimulus is picked up by

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  15. What is true about phytochrome ?

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  16. The form of phytochrome that promotes the germination of seeds of some...

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  17. Phytochrome was isolated by

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  18. In the long dark phase

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  19. Red far-red reversible photoreaction was first observed by

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  20. Phytochrome is a

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