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The most widely accepted theory for asce...

The most widely accepted theory for ascent of sap in trees is

A

Capillarity

B

Role of atmospheric pressure

C

Pulsating action of living cell

D

Transpiration pull and cohesion theory of Dixon and Joly

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The correct Answer is:
D
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DINESH PUBLICATION-TRANSPORT IN PLANTS-REVISION QUESTIONS FROM COMPETITIVE EXAMS
  1. Rate of Water absorption can be increased through

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  2. Water in plants is transported by or ascent of sap take place through

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  3. The most widely accepted theory for ascent of sap in trees is

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  4. Water rises in the stem due to

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  5. According to one vital force theory, ascent of sap is due to acitve pu...

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  6. At what time, the stomatal transpiration is completely stopped

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  7. Upward movement of water through xylem is best explained by

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  8. The principal pathway of water translocation in angiosperms is

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  9. Cohesive force of water is due to

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  10. Ringing/girdling experiment was first performed by

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  11. During osmosis, water passes through a semipermeable membrane

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  12. Diffusion of water through selectively permeable membrane is

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  13. A higher plant cell covered with cutin and suberin is placed in water....

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  14. Water is absorbed from outside solution only when it is

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  15. Supply of excess fertilizer and watering of a grass lawn causes brown...

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  16. During absorption of water by roots , the water potential of cell sap ...

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  17. Plant cells kept in hypertonic solution will get

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  18. 0.1 M solution of a solute has a water potential of

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  19. The movement of free atoms from higher concentration to lower concentr...

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  20. In seed germination the first to occur is

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