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Hello,

There are two methods you would reference in any answer to this question; osmosis (which is simply the net movement of water molecules) and transpiration (which is the evaporation of water vapour from aerial parts of the plant - leaves).

The process of transpiration is linked to the degree of water uptaken at the roots, which is why you seldom see trees bulging at their bases due to over indulgence.

Let me know if I can be of any further assistance.

Hi there. This is rather a long answer and complex. If you would like we could look at it in one lesson online. If that is of interest please let me know. The short answer is water enters the roots by osmosis and then go out of the leaves of the tree through the stomata, by transpiration, in between, it travels through a tube called the xylem, in the stem. Hope that helps - Jon

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