Home
Class 12
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 is basis of quantitative determination of small amounts of growth promoting substances

B

It supports the hypothesis that IAA is auxin

C

It demonstrated polar movement of auxins

D

It made possible the isolation and exact identification of auxin.

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • Plant Growth and Movements

    DINESH PUBLICATION ENGLISH|Exercise CYG|20 Videos

  • Plant Growth and Movements

    DINESH PUBLICATION ENGLISH|Exercise BRAIN TEASERS-IV|41 Videos

  • Plant Growth and Movements

    DINESH PUBLICATION ENGLISH|Exercise BRAIN TEASERS-IV|41 Videos

  • PLANT BREEDING AND DISEASE CONTROL

    DINESH PUBLICATION ENGLISH|Exercise Check your Grasp|10 Videos

  • PLATYHELMINTHES-THE FLAT WORMS

    DINESH PUBLICATION ENGLISH|Exercise check your grasp|9 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.

DINESH PUBLICATION ENGLISH-Plant Growth and Movements-RQ
  1. Which is not the effect of ethylene

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  4. Vernalisation is carried out in plants growing in

    Text Solution

    |

  5. Gibberellins can promote seed germination because of their influence o...

    Text Solution

    |

  6. Assertion.Plant growth regulators are very important for plant growth ...

    Text Solution

    |

  7. Abscisic acid causes

    Text Solution

    |

  8. The characteristics like expansion, breaking dormancy, promoting germi...

    Text Solution

    |

  9. Which amongst the following is a natural growth regulator

    Text Solution

    |

  10. 6-(4-Hydroxy-3 Methyl-trans-2-butenylamine) purine is also called

    Text Solution

    |

  11. Cholodony and Went effect is due to (a) IAA (b) GA (c) Cytokinin ...

    Text Solution

    |

  12. The hormone which reduces transpiration rate by inducing stomatal clos...

    Text Solution

    |

  13. Bolting means

    Text Solution

    |

  14. Phytochrome responsible for flowering is

    Text Solution

    |

  15. The primary and secondary growth of a shoot inhibited by

    Text Solution

    |

  16. The pigment that absorbs red and far-red light in plants, is

    Text Solution

    |

  17. Which one is correct for blooming of short day plants

    Text Solution

    |

  18. Select the correctly matched pair

    Text Solution

    |

  19. One hormone stimulates the closure of stomata and another one influenc...

    Text Solution

    |

  20. Which of the following statements regarding photoperiodism is false

    Text Solution

    |