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Dr. F. Went noted that is coleoptile tip...

Dr. F. Went noted that is coleoptile tips were removed and placed on agar for one hour , the agar would produce a bending when placed on one side of freshly cut coleoptile stumps .Of what sighifcance is this exeriment

A

It made possible the isolation and exact identification of auxin

B

It is the basis for quantitative determination of small amounts of growth-promoting substances

C

It supports the hypothesis that IAA is auxin

D

It demonstrated polar movement of auxins

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The correct Answer is:
B
Dr. F Went isolated auxin from Avena colcoptilG tip. His experiment demonstrated the polar movement of auxins, i.e. it showed that the plants grow towards light in response to a signal generated in the tip of coleoptile by a plant hormone auxin
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NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-Plant Growth and Development -Exercise
  1. You are given a tissue with its potential for differentiation in an ar...

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  2. Auxin can be bioassayed by

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  3. Dr. F. Went noted that is coleoptile tips were removed and placed on a...

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  4. Which one o f the following plant hormone (phytomone ) Is know as a st...

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  5. A few normal seedlingd of tomato were kept in a dark room. After a few...

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  6. During seed germination, its stored food is mobilised by

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  7. Phototropic curvature is result of uneven distribution of

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  8. Coiling of graden pea tendrils around any support is an example of

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  9. One of the synthetic auxin is

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  10. Which one of the following acids is a derivative of carotenoids?

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  11. Senescence as an active devlopmental cellular process in the growth an...

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  12. Impotance of day length ( photoperiodism ) in flowering of plants was ...

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  13. Opening of floral buds is

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  14. The wavelength of light absorbed by Pr form of phytochrome is

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  15. The hormone which was discovered through ' foolish seedling ' disease ...

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

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  17. How does pruning help in making the hedge dense

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  18. An enzyme that can stimulate germination of barley seeds is

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  19. Treatment of seed at low temperature under moist conditions to break i...

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  20. Growth in internodal regions of green plants is due to

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