Evidence of Evolution

1
Evidence of Evolution
2
Evidence that Supports Evolution

• Fossils
• Homologous Structures
• Vestigial Structures
• Comparative Embryology
• Molecular Structure

3
Fossils

• Preserved remains, tracks, or traces of once
  living organisms
• Resemble modern day organisms

4
Homologous Structures

• Structures in different organisms
• Similar structures
• Suggest common ancestry
• Example bones in arm human, whale, bird

5
Vestigial Structures

• Structures reduced in size
• No longer play an important role
• Examples pelvic/hip bones in snakes appendix
  in humans

6
Comparative Embryology

• Comparisons in development of embryos
• Example
• Chicken vs. Humans

7
Molecular Structure

• Compare sequences of DNA
• More similarities closer relation
• 1 2 3
• A A A
• T T A
• T T T
• G C C
• C C G
• C C C