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Subject: Science
Standard: Understands the basic concepts of the evolution of species
Grade Level: Middle School [7-8]
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S9.3.2 | 2. Knows that extinction of a species occurs when the environment changes and the adaptive characteristics of a species do not enable it to survive in competition with its neighbors; extinction of species is common most of the species that have lived on theEarth no longer exist |
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![]() Last update: Wednesday September 07, 2005 PUMAS Editor: Ralph Kahn WebCurator: Cecelia Lawshe URL: http://pumas.jpl.nasa.gov/ benchmarks/benchmark_search2.asp Copyright: © 1996, California Institute of Technology Privacy Statement ALL RIGHTS RESERVED Based on U.S. Government sponsored research |