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Root pressure is maximum when...

Root pressure is maximum when

A

Water absorption as well as transpiration are low

B

Both water absorption and transpiration are high

C

Absorption is low and transpiration is high

D

Absorption is high and transpiration is low

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The correct Answer is:
D
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DINESH PUBLICATION ENGLISH-TRANSPORT IN PLANTS-REVISION QUESTIONS FROM COMPETITIVE EXAMS
  1. Root hairs are found in the zone of :

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  2. Root cap has no role in water absorption because

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  3. Root pressure is maximum when

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  4. Path of water movement from soil to exarch xylem is

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  5. Which fraction of soil water is available to plants for absorption by ...

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  6. Rate of water absorption can be increased through (a) Decreased trans...

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

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

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  9. Water rises in the stem due to

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  10. According to one vital force theory, ascent of sap is due to active pu...

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

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  12. Upward movement of water through xylem is best explained by (a) Cohes...

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  13. The principal pathway of water translocation in angiosperms is

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  14. The cohesive force bof water is due to

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  15. When pheloem is removed by girdling

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  16. During osmosis, flow of water through a semipermeable membrane is

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  17. Diffusion of water through selectively permeable membrane is

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

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

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

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