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ICSE Class 10 Answered

How does water rises up in very tall plants?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

Root pressure and capillarity are not able to transport water to height of several metres. When the leaf cells lose water by transpiration, more water molecules are pulled up due to suction force. This produces a continuous column of water through the stem; this property is known as ‘cohesion’. Adhesion causes the water to stick to the surface of cells. When transpiration occurs, it draws more water molecules from below. Thus in case of very tall plants water rises up due to adhesion and cohesion properties of water.

Answered by | 04 Jun, 2014, 03:23: PM

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