Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 28 - Prokaryotes - Review Questions - Understand: 1



Work Step by Step

Biomarkers are chemical signs of life, not remains of organisms, such as B. A. and D. are wrong since these mention organisms/fossils of them, not chemical markers, and C. is incorrect since carbon-12 doesn't necessarily show that life has been present.
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