1. Evidence for Evolution
1. Fossils 2. Structure a. Homologous b. Analogous c. Vestigial 3. Embryology 4. DNA

2. The Fossil Record
Fossils found show different stages of evolution from extinct species to species that exist today

3. Structures-Homologous
Characteristics inherited from a common ancestor
Have similar structure but may have different functions

4. Structures-Analogous
Structures share similar function but have different structure
Does not imply a common ancestor

5. Structures-Vestigial
Structures in an organism that once had a function but no longer does because of the process of evolution

6. Embryology Animal embryos often start out looking very similar
Through growth and development, the embryos develop different structures making each adult unique

7. Similarities in DNA
All living things share some genes and proteins, suggesting that all life came from a common ancestor
Organisms who are closely related have similar genes that code for proteins