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Root pressure, which plays a small role ...

Root pressure, which plays a small role in xylem flow, is caused by

A

transpiration of water out of the xylem

B

cohesion of water out of the xylem

C

adhesion of water molecules to wall to wall of the xylem

D

high rate of water absorption

Text Solution

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The correct Answer is:
D
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ARIHANT NEET-TRANSPORT IN PLANTS -Chapter exercises A. Taking it together (Assorted Questions of the Chapter for Advanced Level Practice )
  1. In the given flow chart, the flow of water is shown from soil to xylem...

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  2. Boucherie (1940), rejected to vital force theory on the basis that the

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  3. Root pressure, which plays a small role in xylem flow, is caused by

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  4. Ascent of sap by transpiration pull breaks due to

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  5. According to the transpiration cohesion theory, the upward pull of wat...

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  6. Which contributes most to the transport of water from the soil to the ...

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  7. In transpiration

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  8. The cavity formed outside the guard cells of leaf is named as

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  9. Guard cells cannot assimilate food, because of the absence of

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  10. Starch gets converted into glucose in guard cells, when

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  11. In the mechanism of opening of stomata, the important factor is

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  12. Common between guard cells and mesophyll cells is

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  13. According to Steward, ATP is used in stomatal mechanism during

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  14. According to Sayere and Scarth, the opening and closing of stomata is ...

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  15. The lower surface of leaf will have more number of stomata in a

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  16. Increase in CO(2) concentration around leaf results in

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  17. Which of the following is responsible for the closing of stomata ?

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  18. In mesophytes, maximum transpiration occurs through

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  19. Plants growing on hills show

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  20. Which one of the following will not directly affect transpiration?

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