Notes 3: Analyze Patterns and Phylogenetic Trees

• What evidence shows divergent solution?

  Homologous structures and vestigial organs/structures.
• What evidence shows a convergent solution?

  Analogous structures
• Speciation: forming of a new species by evolution from pre-existing

  species
• What happens in speciation?

  gene pools gradually become different, and they can no longer reproduce together. Becomes separate species.
• Divergent evolution speciation: a number of different species arise from

  one common ancestor
• Convergent evolution speciation: unrelated species evolve similar

  characteristics (live in similar environments, not common ancestor)
• Divergent evolution speciation: New environments caused them to evolve to be different
• Phylogeny: evolutionary history of a species or group of related species
• Phylogenetic trees are diagrams that scientists use to organize the research and patterns they find while studying evidence for evolution