Biology 12th Edition

Published by McGraw-Hill Education
ISBN 10: 0078024269
ISBN 13: 978-0-07802-426-9

Chapter 20 - Viruses, Bacteria, and Archaea - Assess - Page 372: 13

Answer

d. cyanobacteria

Work Step by Step

Gram-negative bacteria that first introduced oxygen into the atmosphere through photosynthesis are cyanobacteria. This is due to the fact that they are capable of photosynthesis like plants.
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