Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 36 - 36.5 - Concept Check - Page 799: 1


Phloem sap is moved by a push from the positive pressure built up in living sieve tubes, while xylem sap is usually moved by a pull from the negative pressure which results from transpiration. However, xylem sap sometimes moves due to a push from positive root pressure.

Work Step by Step

Review the mechanisms for driving sap movement (whole chapter 35) and make a list of basic features for the two driving forces for xylem sap movement and the one for phloem sap movement. Use these lists as the basis for your answer.
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