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Updated Biology Courses cardella

General Biology
Prof. Bryan Cardella, M.Ed.

ap biology eaton

AP Biology 
Dr. Carleen Eaton, M.D.

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  • Study Guides

Mechanisms of Evolution

  • The basis of change in populations, whether it’s a population of spiders, microorganisms, or people, occurs at the level of an organism’s genetic material—its DNA.

  • The patterns, trends, and rates of change can be evaluated broadly at the level of a species or specifically at the level of an allele.

  • When a population or a specific trait doesn’t change, it’s at equilibrium. However, this rarely occurs. Forces that elicit change are constantly bombarding any dynamic, living system.

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