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21)Mention physical properties of water which help inascent of xylem sap.22) What are nroteins? Name any two amino acids |
Answer» The transpiration drivenascentof xylemsapdepends mainly on the following physical properties of water(i) Cohesion Mutual attraction betweenwatermolecules. (ii) Adhesion Attraction ofwatermolecules to polar surfaces (such as the surface of tracheary elements). |
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