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If an etiolated stem could be first satu...

If an etiolated stem could be first saturated with auxin by spraying and then exposed to a streak of light from one side it will

A

Bend toward the light

B

Bend away from the light

C

Grow straight upward

D

Be prevented from growing

Text Solution

Verified by Experts

The correct Answer is:
A
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In an experiment, Pooja used a equilateral triangular glass prism and projected a narrow beam of white light source from one side of the surface of the prism. She placed a screen on the other side and saw many colours appearing as patches on the screen. But when she used a red light source, she could only see a red patch on the screen. Similarly she used a blue and green light source and could only see one colour patch on both occasions. The reason why she could no see any other colour when the red light was used was because:

In an experiment, Pooja used a equilateral triangular glass prism and projected a narrow beam of white light source from one side of the surface of the prism. She placed a screen on the other side and saw many colours appearing as patches on the screen. But when she used a red light source, she could only see a red patch on the screen. Similarly she used a blue and green light source and could only see one colour patch on both occasions. Which of the following can be the correct explanation that Pooja can give to her friends to explain this phenomenon?

CENGAGE BIOLOGY-PLANT GROWTH AND DEVELOPMENT -Archives
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  2. Opening of floral buds is

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  3. Which one of the following pairs is not correctly matched?

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

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

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

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  8. One of the synthetic auxin is

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

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  10. Phototropic curvature is result of uneven distribution of

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

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

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  13. One of the commonly used plant growth hormone in tea plantation is

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  14. Root development is promoted by

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

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

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  17. Vernalization stimulates flowering in

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

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  19. Which one of the following is not used for ex situ plant conservation

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  20. Non-albuminous seed is produced in

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

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