
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Transcribed Image Text:The graph below shows daily water potential in the xylem of a woody plant. Which of the following statements is best supported using the data?
Xylem water potential (MPa)
O
Ο Ο Ο
0.0
-0.2 -
-0.4
-0.6
-0.8
-1.0-
-1.2-
-1.4-
-1.6
-1.8-
-2.0-
6
AM
8
1
10
L
TIME
1
12
1
2
L
PM
4
L
6
Water potential decreases, beginning around 6 am, because of increased mineral uptake.
High water potential results in greater transpiration.
Water potential at noon is a reflection of high rates of transpiration.
Increasing pressure potential after noon results in decreasing water potential.
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