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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
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What would happen to you frll along a straight tunnel through the center of Earth. The problem has been analyzed ever since Galileo considered it. However, the most enchanting version is the one about Alice where she falls down the rabbit hole in ''Alice in Wonderland'', which Lewis CArroll wrote to entrain the (real) Alice Liddell when she was a child. Here is a passage from Alice : Either the well was very deep, or she fell very slowly, for she had plenty of time as he went down to look about her, and to wonder what was going to happen next. First, she tried to look down and make out what she was coming to, but it was too dark to see anything : then she looked at the sides of the well, and noticed that they were filled to see anything : then she looked at the sides of the well, and noticed that they were filled with cupborad and look - shelves , here and there she saw maps and pictures hung upon pegs. She took down a jar from one of the shelves as the passed : it was labeled ''ORANGE MARMALADE'', but to her great disappointment it was empty : she did not like to drop the jar, for fear of killing somebody underneath, so managed to put it into one of the cupboards as she fell past it ..... Down, down, down. Would the fall never come to end ? ''I wounder how many miles I' ve fallen by this time ?'' she said aloud. ''I must be getting somehere near the centre of the earth.'' If Alice did fall down a tunel to the center of the Earth, would she drift slowly enough to see or grab things along the way ? Would the gravitational force that pulled her downward wane during the descent ? These questions were hot topice in Carroll's time, but Gallileo had the correct explanation long before then. If Alice reached her wonderland 21 minutes after the fall, (neglecting air resistance) the wouderland was

What would happen to you frll along a straight tunnel through the center of Earth. The problem has been analyzed ever since Galileo considered it. However, the most enchanting version is the one about Alice where she falls down the rabbit hole in ''Alice in Wonderland'', which Lewis CArroll wrote to entrain the (real) Alice Liddell when she was a child. Here is a passage from Alice : Either the well was very deep, or she fell very slowly, for she had plenty of time as he went down to look about her, and to wonder what was going to happen next. First, she tried to look down and make out what she was coming to, but it was too dark to see anything : then she looked at the sides of the well, and noticed that they were filled to see anything : then she looked at the sides of the well, and noticed that they were filled with cupborad and look - shelves , here and there she saw maps and pictures hung upon pegs. She took down a jar from one of the shelves as the passed : it was labeled ''ORANGE MARMALADE'', but to her great disappointment it was empty : she did not like to drop the jar, for fear of killing somebody underneath, so managed to put it into one of the cupboards as she fell past it ..... Down, down, down. Would the fall never come to end ? ''I wounder how many miles I' ve fallen by this time ?'' she said aloud. ''I must be getting somehere near the centre of the earth.'' If Alice did fall down a tunel to the center of the Earth, would she drift slowly enough to see or grab things along the way ? Would the gravitational force that pulled her downward wane during the descent ? These questions were hot topice in Carroll's time, but Gallileo had the correct explanation long before then. The only explanation of Alice's small velocity can be air resistance she experinces. Choose the correct statement assuming that Alice falls with constant speed.

MOTION-PLANT GROWTH AND DEVELOPMENT-Exercise - 3
  1. One of the synthetic auxin is

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

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  3. The annular and spirally thickened conducting elements generally deve...

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  4. Phototropic curvature is result of uneven distribution of

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  5. Photoperiodism was first characterized in

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  6. Root development is promoted by

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

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  8. Vernalisation simulates flowering in

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  9. Through their effect on plant growth regiulators, what do the temperat...

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

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  11. A few normal seedlings of tomato were kept in a dark room. After few d...

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

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  13. The rate of growth of any organism follows Or Typical growth curve...

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  14. What causes a green plant exposed to the light on only one side, to be...

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  15. Auxin can be bioassayed by

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  16. The Avena curvature is used for bioassay of

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  17. You are given a tissue with its potential for differ- entiation in an ...

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  18. Fruit and leaf drop at early stages can be prevented by the applicatio...

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  19. It takes very long time for pineapple plants to produce flowers. Which...

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  20. What is the site of perception of photoperiod necessary for induction ...

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