8.E.6B Adaptation by natural selection acting over generations is one important process by which species change in response to changes in environmental conditions. The resources of biological communities can be used within sustainable limits, but if the ecosystem becomes unbalanced in ways that prevent the sustainable use of resources, then ecosystem degradation and species extinction can occur.

State: 
South Carolina
Subject: 
Science
Year: 
2014
Grade: 
Middle School (6-8)