The Cell: A Molecular Approach 7th Edition

Published by Sinauer Associates
ISBN 10: 160535290X
ISBN 13: 978-1-60535-290-9

Chapter 1 - An Overview of Cells and Cell Research - Question - Page 44: 4


The great oxygenation event was triggered by the evolution of blue green algae.

Work Step by Step

Prior to the evolution of blue green algae, the earth's environment was reducing. By releasing oxygen into the atmosphere through photosynthesis, the atmosphere on earth became oxygen rich. The blue green algae used chlorophyll and could utilize photosynthesis as photo-autotrophs, making oxidative metabolism favorable for the future of evolution on earth.
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