1. KEY CONCEPT Evidence of common ancestry among species comes from many sources.

2. Types of Adaptations
Structural Adaptation: Affect the changes in structure of the body (skin color, shape etc.)
Physiological Adaptation: Affect the way the body functions (metabolism, drug resistance, a molecule made in the body, etc.)

3. Evidence for evolution in Darwin’s time came from several sources.
Fossils provide evidence of evolution.
Fossils in older layers are more primitive than those in the upper layers.

4. Video link

5. Embryology provides evidence of evolution.
identical larvae, different adult body forms
similar embryos, diverse organisms
Larva
Adult barnacle
Adult crab

6. The study of anatomy provides evidence of evolution.
Homologous structures are similar in structure but different in function.
Homologous structures are evidence of a common ancestor.
Human hand
Bat wing
Mole foot

7. The study of anatomy provides evidence of evolution.
Analogous structures have a similar function.
Human hand
Bat wing
Mole foot
Fly wing
Analogous structures are not evidence of a common ancestor.

8. Structural patterns are clues to the history of a species.
Vestigial structures are remnants of organs or structures that had a function in an early ancestor.
Ostrich wings are examples of vestigial structures.

9. Genetic Comparisons
Comparison of DNA and Amino Acid sequences provides evidence for Evolution.
-It is suggested that organisms with similar DNA sequences may share a relationship or common ancestor.

10. Write the organisms in order in terms of how close you think they are to human.
Elephant, Bacteria, Iguana, Mushroom, Ant, Gorilla, Earthworm, Koala bear, Corn plant, and Pigeon