General BiologyProf. Bryan Cardella, M.Ed.
AP Biology Dr. Carleen Eaton, M.D.
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IV. Evolutionary Biology : Lecture 2 | 19:21 min
The basis of change in
populations, whether its a population of spiders, microorganisms,
or people, occurs at the level of an organisms genetic
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 doesnt change, its at equilibrium. However, this rarely
occurs. Forces that elicit change are constantly bombarding any
dynamic, living system.