Perhaps 98 percent to 99 percent of all species that have ever existed are extinct. Nearly all went extinct long before humans arrived on the scene. Why should we be concerned about the extinction of organisms today?

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN:9781305967359
Author:STARR
Publisher:STARR
Chapter18: Life's Origin And Early Evolution
Section: Chapter Questions
Problem 14SA: During the Precambrian, _______. a. atmospheric oxygen concentration declined b. bacteria, archaea,...
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Perhaps 98 percent to 99 percent of all species that have ever existed are
extinct. Nearly all went extinct long before humans arrived on the scene. Why
should we be concerned about the extinction of organisms today?

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