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Learning Objectives
By the end of this section, you will be able to:
- Explain sources of evidence for evolution
- Define homologous and vestigial structures
The evidence for evolution is compelling and extensive. Looking at every level of organization in living systems, biologists see the signature of past and present evolution. Darwin dedicated a large portion of his book, On the Origin of Species, identifying patterns in nature that were consistent with evolution and since Darwin our understanding has become clearer and broader.
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