1. What kind of evolution do homologous structures indicate?

2. What kind of evolution do analogous structures indicate?

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Evidence for Evolution

• Homologous

• Divergent evolution: closely related species evolving different characteristics (Away from each other)

• Analogous

• Convergent evolution: similar characteristics developing in unrelated species

Evidence for Evolution

Cetacean Evolution• Analysis #4

1. Restate your claim

2. One piece of evidence

3. Support that claim with that evidence by:

• Giving the specific significant traits of the evidence

• How those traits demonstrate the claim

4. Repeat

Cetacean Evolution• Any questions?

• Video:

• https://www.youtube.com/watch?v=FE49xEU_z7g

• Fossils

• Biogeography

• Embryology

• Homologous structures

• Analogous structures

• Vestigial structures

• Gene comparisons

• Protein comparisons

Evidence

Species

Species

Speciation

Speciation

Reproductive Isolation

Reproductive Isolation

Behavioral Isolation

Behavioral Isolation

Behavioral Isolation

Bonobo Chimpanzee

Geographic Isolation

Geographic Isolation

Temporal Isolation

Temporal Isolation

Speciation

Common Ancestor

Common Ancestor

Common Ancestor

Common Ancestor

Extinction

Adaptive Radiation

Punctuated Equilibrium

Punctuated Equilibrium

Divergent Evolution

Convergent Evolution

Cladograms

Cladograms

Cladograms

Cladograms

Cladograms

Cladograms