The tallest tree in the world reaches over 115 metres. It is a coastal redwood in Redwood National and State Parks, Humboldt County, USA (a UNESCO World Heritage site and an International Biosphere reserve).
Let us consider how water moves up inside the trunk of one of these giants to the leaves at the top. Once we have reviewed the biology involved, we will consider some of the questions that you might expect on this topic in an examination paper, based on explaining the results of research.
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