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The phytohormone, which helps in germina...

The phytohormone, which helps in germination of seed is

A

ABA

B

auxin

C

gibberellin

D

cytokinin

Text Solution

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The correct Answer is:
C
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P,Q,R and S are four major types of phytohormones. P is a phytohormone which functions mainly as a growth inhibitor. It promotes the wilting and fallin, of leaves. Q, R and S are phytohormones which all promote growth on plants in various ways. Q is responsible for the phenomenon of phototropism in plants. R is involved mainly in shoot extensions. The phytohormone S helps in breaking the dormancy of seeds and buds. what are P,Q,R and S? Give one reason each for your choice.

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ARIHANT NEET-PLANT GROWTH AND DEVELOPMENT -CHAPTER EXERCISES (MEDICAL ENTRANCES GALLERY )
  1. During seed germination its stored food is mobilised by

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  2. Movement of tendrils in response to touch is known as

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  3. The phytohormone, which helps in germination of seed is

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  4. Compare the statement A and B. Statement A Ethylene is a gas, which ...

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  5. Hormone replacing the requirement of vernalisation is

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  6. The rosette habit of cabbage can be changed by applicaton of

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  7. Apical dominance is caused by

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  8. Which of the following hormone promotes seed dormancy and bud dormancy...

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  9. A plant hormone used for inducing morphogensis in plant tissue culture...

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  10. The pigment sensitive for red and far-red light is

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  11. Fluorine ring is a feature of

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  12. Cell elongation in internodal regions of the green plants takes place ...

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  13. Day neutral plant relates to

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  14. Auxanometer is used to measure plant organ

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  15. Bolting may be induced by

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  16. Which one of the following pairs is not correctly matched ?

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  17. Photoperiodism was first characterized in

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  18. Phototropic curvature is result of uneven distribution of

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  19. Which one of the following synthetic growth regulators is used to prom...

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  20. One of the commonly used plant growth hormone in tea plantation is

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