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The rate of growth in roots is decreased...

The rate of growth in roots is decreased by one of the following plant hormones. This plant hormone is:

A

gibberellin

B

auxin

C

cytokinin

D

ethylene

Text Solution

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The correct Answer is:
B
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LAKHMIR SINGH & MANJIT KAUR-CONTROL AND COORDINATION -Exercise
  1. The growth movement of a plant part in response to the touch of an obj...

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  2. The climbing organs of plants like tendrils grow towards any suppory w...

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  3. The rate of growth in roots is decreased by one of the following plant...

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  4. When the leaves of a Mimosa pudica plant are touched with a finger, th...

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  5. Dandelion flowers open the petals in bright light during the daytime b...

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  6. To which of the following directional stimulus roots of a plant do not...

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  7. One of the following is not caused by the growth related movement of t...

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  8. The bending of the root of a plant away from a source of light is caus...

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  9. Most of the plant hormones promote plant growth. A plant hormone which...

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  10. The movement of a shoot towards light is:

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  11. The bending of the root of a plant away from a source of light is caus...

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  12. The plant part which exhibits negative geotropism is:

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  13. Which of the following are not tropisms? (i) growing of pollen tube...

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  14. The chemical substance P is made and secreted by the meristematic tiss...

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  15. A potted plant is growing in a transparent glass jar. In this plant, X...

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  16. There are three plants A,B and C. the flowers of plant A open their pe...

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  17. While conducting experiments to study the effect of various stimuli on...

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  18. P and Q are two types of plants having weak stems which cannot stand u...

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  19. The top part A of the flask-shaped reproductive organ X in the flower ...

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  20. P,Q,R and S are four major types of phytohormones. P is a phytohormone...

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