Comparative embryology provides evidence of evolution by showing that closely related species have similar embryonic development, with structures appearing during development that are not present in adults and represent ancestral forms. For example, all vertebrate embryos have gills that become ear canals and tails/tailbones, and pass through larval fish stages, even though these structures do not remain in most adult forms.

1. Evidence of Evolution:
Comparative Embryology

2. Comparative Embryology

3. Comparative Embryology
Closely related species have similar embryological
development.
Structures appear in the embryonic stages that serve
no purpose and are not present in the adult.

4. Comparative Embryology
Example: Vertebrate Embryos
•All have gills which eventually become ear canals
•All have tails/tailbones.
•All pass stages which represent larval fish.

5. Comparative Embryology

6. How is Comparative Embryology
Evidence of Evolution?