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Cohesion among water, adhesion, capillar...

Cohesion among water, adhesion, capillarity all help in

A

Apoplastic movement from root hair to root xylem

B

Symplastic movement from root hair to root xylem

C

Ascent of sap in phloem elements due to root pressure

D

Translocation of organic solutes in phloem

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A
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What role cohesion and adhesion play in xylem transport? (a) Like transpiration, they create a tension (b) Like root pressure, they create a positive pressure (c) Like sugars, they cause water to enter xylem (d) They create a continuous water column in xylem

Will the ascent of sap be possible without the cohesion and adhesion of the water molecules ? Explain.

Upward movement of water through xylem is best explained by (a) Cohesion theory (b) Pulsation theory (c) Capillarity theory (d) Root pressure theory

Choose the proposition among the following that is true for all n in NN

Statement-1 : If adhesion is greater than cohesion, then the meniscus is concave. And Statement-2 : If adhesion is greater than cohesion, then the liquid will not wet the solid.

Cohesion-tension-transpiration pull model explain that water is mainly 'pulled' through the plant.

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AAKASH SERIES-TRANSPORT IN PLANTS -EXERCISE III
  1. Cohesion among water, adhesion, capillarity all help in

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  2. The water potential of pure water is:

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  3. Which of the following facillitates opening of stomatal aperture ?

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  4. Specialised epidermal cells surrounding the guard cell are called

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  5. The phloem sap is

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  6. Water vapour comes out from the plant leaf through the stomata} openin...

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  7. Root pressure is usually because of

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  8. Roots play insignificant in absorption of water in :

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  9. A column of water within xylem vessels of tall trees does not break un...

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  10. Transpiration and root pressure cause water to rise in plants by

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  11. The osmotic expansion of a cell kept in water is chiefly regulated by

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  12. Lenticels are involved in

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  13. Which of the following criteria does not pertain to facilitated transp...

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  14. Which one of the following is correctly matched

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  15. Guard cells differ from other epidermal cells in having

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  16. Which one of the following elements in plants is not remobilised ?

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  17. Guttation is the result of

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  18. which one of the following structures between two adjacent cells is an...

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  19. Guard cell help in :

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  20. The rupture and fractionation do not usually occur in the water column...

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  21. Two cells A and B are contiguous, Cell A has osmotic pressure 10 atm, ...

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