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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
The most widely accepted theory for ascent of sap in trees is transpiration pull and cohesion theory of Dixon and Joly.
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A2Z-TRANSPORT IN PLANTS-Section - C Previous Years' Examination Questions (NEET/AIPMT Questions)
  1. A cell increases in volume if the external medium is

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  2. A and B cells are contiguous. Cell A has OP=10 atm, TP=7 atm and DPD=3...

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

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  4. Water avbsorbed by root in order to meet the requirement of transpirat...

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  5. Which of the following statement are not true? (a) In CAM plants, st...

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  6. Water column does not rupture during ascent in tracheary elements due ...

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  7. Which of the following is used to determine the rate of transpiration ...

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  8. Most water flow in root occurs via apoplast as

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  9. For the same amount CO(2) fixed s C(4) plant, in comparison with a C(3...

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  10. In the cell walls of the guard cells, cellulose microfibrils are orien...

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  11. Which of the following is done during ringing experiment

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  12. Attraction of water molecules to polar surfaces is known as

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  13. Which of the following is not the purpose of transpiation?

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  14. Compared to 1M sucrose solution, the Psi(omega) of 1M sodium chloride ...

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  15. Which of the following factors is most important in regulation of tran...

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  16. Cohesion theory of ascent of sap was proposed by

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  17. The force responsible for raising water in 100 ft tall plants is

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  18. Stomata open when guard cells swell due to

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  19. Stomatal opening and closing is due to

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  20. Which of the following is a rapid type of water absorption?

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