Answer
According to the pressure flow hypothesis, sugars are pumped through phloem tissues, which changes the concentration of fluids and causes the flow of fluids.
Work Step by Step
As above
Biology 2010 Student Edition
by Miller, Kenneth R.; Levine, Joseph S.
Published by
Prentice Hall
ISBN 10:
9780133669510
ISBN 13:
978-0-13366-951-0
Chapter 23, Plant Structure and Function - 23.5 - Transport in Plants - 23.5 Assessment - Page 687: 2a
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