1. Monday, April 18 th Objectives: Explain how biological evolution is the consequence of the interactions of genetic variation, reproduction and inheritance, and natural selection and time. Explain how multiple lines of scientific evidence support biological evolution Remember to take the genetics test at lunch or after school if you need to make it up Agenda: 1.Unit overview 2.Darwin vs. Lamarck 3.Wallace Jigsaw 4.Cartoon Activity Day 1

2. Unit overview You will be able to… …compare and contrast the theories of evolution developed by Lamarck and Darwin …evaluate different types of evidence evolution (biogeography, fossils, homologous structures, vestigial organs and DNA) …explain how scientific knowledge can change in light of new evidence …design a scenario resulting in natural selection and predict its effect on a population of organisms …address arguments concerning common misconceptions regarding the theory of evolution We will be able to answer these questions: Why is there so much diversity of life on Earth? How do we know evolution occurs? What do you need for evolution to take place? How can we explain why there are fossils of organisms that aren’t alive today? Activities: Evidence Presentations Variation Lab Birds and Dots Lab Model-based Inquiry

3. Introduction to Evolution

4. Problem What about the animals that no one had seen before? Churches: “extinction” is blasphemy Fossilized creatures didn’t go extinct…they “changed”

5. Theory of Acquired Characteristics Jean-Baptiste Lamarck 1.Characteristics that get used, develop. Those that aren’t, get reduced. L'influence des circonstances (adaptive force) 2.Characteristics that develop get passed on to the offspring. Le pouvoir de la vie (complexifying force)

6. Example (according to Lamarck) Giraffes have long necks because their ancestors strained to reach leaves in trees. The offspring had slightly longer necks. Over many generations, longer and longer necks developed.

7. Voyage of the Beagle 90 feet long

8. Lyell Earth changes over time Darwin Struggle for existence Life can changes over time too Malthus Overpopulation

9. Plants: well suited to their environments. Galapagos: different climates, different animals (Some of) Darwin’s Observations:

10. Alfred Russel Wallace and Controversy

11. Theory of Natural Selection Charles Darwin, Alfred Russel Wallace 1.All organisms vary in their characteristics. 2.Organisms always struggle for food, habitat, protection and mates. 3.On average, offspring that vary in ways favored by the environment will survive and reproduce more successfully. 4.Over time, favorable characteristics accumulate in the population

12. Example (according to Darwin and Wallace) Giraffes have long necks because their ancestors that had necks slightly longer than average could reach food better than their short-necked relatives. These longer-necked giraffes got more food, were healthier, and left more offspring behind.

13. Darwin/Wallace Lamarck