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Unformatted text preview: from the soil to the xylem? 5. How do plants move water up the xylem? 6. What structure do plants use to control gas exchange? How does this function? 7. Is transport in the phloem similar to transport in the xylem? What is the pressure bulk flow model? How does it operate? David H. Bos (2009). This material can be used for non-profit educational purposes, if properly attributed. All other uses are prohibited unless written permission is granted....
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