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"" are sprayed on the cotton fields to...

`"_________"` are sprayed on the cotton fields to defoliate and hence facilitate machine picking of bolls.
1. antiauxins
2. sodium salts of NAA
3. naphthalene acetic acid & related auxins
4. herbicides

A

antiauxins

B

sodium salts of NAA

C

naphthalene acetic acid & related auxins

D

herbicides

Text Solution

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The correct Answer is:
A
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TRUEMAN BIOLOGY-PLANT GROWTH AND DEVELOPMENT AND PLANT MOVEMENTS -MULTIPLE CHOICE QUESTIONS
  1. Artificial application of auxins like IAA, IBA and NAA to unpollinated...

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  2. Who amongst the following is discoverer of auxin ? 1. Skoog 2. Went...

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  3. "" are sprayed on the cotton fields to defoliate and hence facilita...

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  4. The nature of all gibberellins is

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  5. In a plant the concentration of gibberellins is highest in 1. seeds a...

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  6. Dwarfness can be controlled by treating the plant with

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  7. Hormone that breaks dormancy of seeds/potato tuber is 1. IAA 2. ABA ...

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  8. The first cytokinin was isolated by

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  9. The first natural cytokinin of plants is

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  10. Hormone primarily concern with cell division is 1. Ethylene 2. NAA ...

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  11. Morphogenesis is controlled by an interaction between 1. auxins and ...

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  12. The phenomenon of delay of senescence by cytokinin is known as 1. Ri...

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  13. The hormones which regulate phloem transport are

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  14. Cytokinin synthesis is maximum in

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  15. Name the hormone which stimulates transverse or isodiametric growth

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  16. Major precursor of ethylene production in plants is

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  17. Match the items of column I and column II {:("Column I","Column II")...

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  18. Abscisic acid is mostly found in

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  19. Which one of the following is a natural growth inhibitor ?

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  20. Closure of stomata' is brought about by

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