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In many plants the change over from vege...

In many plants the change over from vegetative to reproductive phase takes place in response to

A

the length of the day

B

the severity of temerature

C

mainly, the food material available in the soil

D

the `O_(2)` present in the air

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The correct Answer is:
A
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ARIHANT NEET-PLANT GROWTH AND DEVELOPMENT -CHAPTER EXERCISES ( TAKING IT TOGETHER )
  1. Seed dormancy can be broken by

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  2. The flowering respones of plants can be changed by

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

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

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

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

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

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  8. In short day plants, flowering is inhibited by

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  9. The long-day plants require

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

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

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

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

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

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  15. Photoperiodic stimulus is picked up by

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  16. What is true about phytochrome ?

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

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  18. Phytochrome was isolated by

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  19. In the long dark phase

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

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