Answer
A.
Work Step by Step
Bacteria (A.) are the only organisms able to fix nitrogen out of the air, and B.-D. are non-bacteria.
Biology (11th Edition)
by Raven, Peter; Johnson, George; Mason, Kenneth; Losos, Jonathan; Singer, Susan
Published by
McGraw-Hill Education
ISBN 10:
1259188132
ISBN 13:
978-1-25918-813-8
Chapter 38 - Plant Nutrition and Soils - Review Questions - Understand - Page 791: 5
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