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PSSA Vocab Unit 6
Term | Definition |
---|---|
Evolution | A process of change that explains why what we see today is different from what existed in the past; changes in galaxies, stars, solar system, earth and life on earth. Biological evolution is a change in hereditary characteristics. |
Extinction | The complete elimination of a species from the earth. |
Endangered Species | A species that is in danger of extinction throughout all or a significant portion of its range. |
Equilibrium | The ability of an ecosystem to maintain stability among its biological resources (e.g., forest, fisheries, crops) so that there is a steady optimum yield. |
Sustainablility | The ability to keep in existence or maintain. A sustainable ecosystem is one that can be maintained. |
Succession | The series of changes that occur in an ecosystem with the passing of time. |