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Root pressure theory of ascent of sap is...

Root pressure theory of ascent of sap is unacceptable because

A

Water can ascend without root or root pressure

B

Root pressure cannot explain ascent of sap beyond 10 meters

C

Root pressue is more during early morning then afternoon

D

Root pressure does not occur in spring .

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The correct Answer is:
A
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DINESH PUBLICATION-TRANSPORT IN PLANTS-CHECK YOUR GRASP
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  2. Increase in temperature

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  3. Osmotic pressure of 0.1 M sucrose solution is -2.3 bars . What is the ...

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  4. plant imbibants are

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  5. A positively changed colloid will imbibe maximum at

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  6. Which one is used for measuring osmotic potential of living cells ?

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  7. In case T.P. is less than the mixmum W.P., the cell will

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  8. Osmotic pressure of a cell is zero when

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  9. Amount of water transpired can be known with the help of

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  10. In a well watered soil, the plant show loss of turgidity during noon. ...

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  11. Who proposed conversion of starch to suger during opening of stomata.

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  12. The pH which favours hydrolysis of starch in guard cells is

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  13. The hormone required for stomatal opening is

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  14. Potometer and porometer were invented by

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  15. Margins of mature colocasia leaves appear withered/necrotic due to

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  16. Cobalt chloride paper test for transpiration was developed by

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  17. The term root pressure was coined by

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  18. What prevent wall to wall (apoplast ) movement of absorbed water?

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  19. The structure pressent in endodermal cells of root which prevents apo...

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  20. A cell placed in hypertonic solution will

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  21. A water- logged soil often causes wilting of leaves due to

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