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The transpiration-driven ascent of xylem...

The transpiration-driven ascent of xylem sap depends mainly upon`"______"` property of water.

A

cohesion

B

adhesion

C

surface tension

D

all of these.

Text Solution

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The correct Answer is:
D
There is a continuous column of water from root through the stem and into the leaves. The water column is present in tracheary elements the column of water does not fall down under the impact of gravity because forces of transpiration provide both energy and necessary pull . Cohesion, adhesion and surface tension keep the water in place.
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  1. Which of the following statements is incorrect?

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  2. Ascent of sap is best explained by

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  3. The transpiration-driven ascent of xylem sap depends mainly upon"" pro...

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  4. Loss of water in the form of vapours from the living tissues of aerial...

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  5. Refer to the given figure Select the correct statement regarding ...

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  6. Amphistomatic leaf with stomata distributed equally on both the surfac...

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  7. The given figure shows two states of a stomata In which of the ...

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  8. Refer to the given figure and select the option which correctly identi...

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  9. Match columnI with column II and select the correct option from the co...

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  10. Water moves up against gravity and even for a tree of 20mheight the ti...

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  11. The bulliform cells of leaves lose their turgidity during excessive

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  12. Match column I with column II and select the correct option from the c...

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  13. Concentration of minerals in the soil is usually "" than the concentra...

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  14. Which of the following statements is correct ?

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  15. Which of the following elements are most readily mobilised?

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  16. Statement 1: Xylem transport is unidirectional. Statement 2: Phloem ...

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  17. Unidirectional flow of water minerals, some organic nitrogen and hormo...

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  18. The manufactured food in a green plant moves from the leaves to other ...

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  19. Multi-directional flow of a variety of organic and inorganic solutes o...

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  20. phloem sap is mainly made of

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