Answer
E
Work Step by Step
Ecosystem boundaries cannot be defined since there are rarely boundaries to any ecosystem.
Environmental Science for AP* (2nd Edition)
by Friedland, Andrew J.; Relyea, Rick
Published by
W. H. Freeman
ISBN 10:
1464108684
ISBN 13:
978-1-46410-868-6
Chapter 3 - Module 6 - The Movement of Energy - AP Review Questions - Page 78: 6
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