Home
Class 11
BIOLOGY
Dr. F. Went noted that if coleoptile tip...

Dr. F. Went noted that if 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 movements of auxins

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • PLANT GROWTH AND DEVELOPMENT

    CENGAGE BIOLOGY ENGLISH|Exercise Assertion-Reasoning|5 Videos

  • PHOTOSYNTHESIS IN HIGHER PLANTS

    CENGAGE BIOLOGY ENGLISH|Exercise ARCHIVES|30 Videos

  • PLANT KINGDOM

    CENGAGE BIOLOGY ENGLISH|Exercise ARCHIVES|70 Videos

Similar Questions

Explore conceptually related problems

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 what is the significance of this experiment

What was the reason of the shoot tip showing growth when coleoptile tipes were removed and agar block was kept?

A currrent I is passed through a silver strip of width d and area of cross section A. The number of free electrons per unit volume is n. (a) Find the drift velocity v of the electrons. (b) If a magnetic field B exists in the region as shown in what is the average magnetic force on the free electrons? (c) Due to the magnetic force, the free electrons get accumulated on one side of the conductor along its length. This produces a transverse electric field in the conductor which opposes the magnetic force on the electrons. Find the magnitude of the electric field which will be the potential diference developed across the width of the conductor due to the electron- accumulation? The appearance of a transverse emf, when a current-carrying wire is placed in a magnetic field, is called hall effect.

A child wanted to separate the mixture of dyes constituting a sample of ink. He marked a line by the ink on the filter paper and placed the filter paper in a glass containing water as shown in figure. The filter paper was removed when the water moved near the top of the filter paper. (a) What would you expect to see, if the ink contains three different coloured components? (b) Name the technique used by the child. (c) Suggest one more application of this technique.

CENGAGE BIOLOGY ENGLISH-PLANT GROWTH AND DEVELOPMENT -Archives
  1. Phototropic curvature Is the resutt of uneven distribution of

    Text Solution

    |

  2. Importance of day length ( photoperiodism ) in flowering of plants was...

    Text Solution

    |

  3. Coiling of garden pea tendrils around any support is an example

    Text Solution

    |

  4. One of the commonly used plant growth hormone in tea plantations is -

    Text Solution

    |

  5. Root development is promoted by -

    Text Solution

    |

  6. Through their effect on plant growth regulators, what do the temperatu...

    Text Solution

    |

  7. Which one of the following generally acts as an antagonist to gibberel...

    Text Solution

    |

  8. Vernalisation stimulates flowering in -

    Text Solution

    |

  9. During seed germination its stored food is mobilized by

    Text Solution

    |

  10. Which one of the following is not used for exsituplant conservation ?

    Text Solution

    |

  11. Non-albuminous seed is produced in

    Text Solution

    |

  12. Which one of the following growth regulators is known as 'stress hormo...

    Text Solution

    |

  13. A few normal seedling of tomato were kept in a dark room. After a few ...

    Text Solution

    |

  14. Dr. F. Went noted that if coleoptile tips were removed and placed on a...

    Text Solution

    |

  15. What causes a green plant exposed to the light on only one side to ben...

    Text Solution

    |

  16. Typical growth curve in plants is

    Text Solution

    |

  17. Auxin can be bioassayed by

    Text Solution

    |

  18. The Avena curvature is used for bioassay of

    Text Solution

    |

  19. You are given a tissue with its potential for differentiation in an ar...

    Text Solution

    |

  20. Phytochrome is a

    Text Solution

    |