Biology: The Unity and Diversity of Life (14th Edition)

Published by Brooks/Cole Publishing Co.
ISBN 10: 1305073959
ISBN 13: 978-1-30507-395-1

Chapter 19 - Data Analysis Activities - Page 317: 1


A decline in asteroid impacts occurred first.

Work Step by Step

By looking at the graph, we can see how the green line (asteroid impacts) is decreasing many years before the blue line (atmospheric oxygen) begins increasing.
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