Answer
C. 10 million
Work Step by Step
Current estimates for the amount of species that are currently present on earth range between 5 - 95 million. However most scientists agree that there are about 10 million.
Environmental Science for AP* (2nd Edition)
by Friedland, Andrew J.; Relyea, Rick
Published by
W. H. Freeman
ISBN 10:
1464108684
ISBN 13:
978-1-46410-868-6
Chapter 5 - Module 14 - The Biodiversity of Earth - AP Review Questions - Page 153: 1
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