1. Start-up for Monday, March 3, 2014
1. Summarize Natural Selection.
2. Complete the table identifying the three parts of Darwin’s theory of natural selection.
Theory Part
What does it mean?
Example

2. Ch. 15-3 Evidence of Evolution Objectives:
Students will:
A) Compare artificial selection (selective breeding) to natural selection
B) List the four pieces of evidence of evolution that Darwin identified.
C) Summarize how each supports the evolution theory.

4. A) Compare artificial selection (selective breeding) to natural selection
nature provides variation, humans select variations that are useful.
Example - a farmer breeds only his best livestock

5. A) Compare artificial selection (selective breeding) to natural selection
The traits that help an organism survive in a particular environment are “selected” in natural selection
Nature provides variation, nature selects variations that are useful.
Animals breed on their own

6. Evidence of Evolution Fossil Record
B) List the four pieces of evidence of evolution that Darwin identified.
Evidence of Evolution
Fossil Record
Geographic Distribution of Living Species
Homologous Body structures
Similarities in Embryology

7. 1. The Fossil Record Fossil Record provides evidence of evolution
C) Summarize how each supports the evolution theory.
1. The Fossil Record
Fossil Record provides evidence of evolution
Fossils show change over time
Supports Survival of the Fittest and Descent with Modification = Common Descent

8. Relative vs. Absolute Dating
C) Summarize how each supports the evolution theory.
1. The Fossil Record
Relative vs. Absolute Dating

9. 1. The Fossil Record Relative Dating
C) Summarize how each supports the evolution theory.
1. The Fossil Record
Relative Dating
Determines fossil’s relative age
Estimates fossil age compared to other fossils
Drawback = no info about age in years

10. Absolute Dating 1. The Fossil Record
C) Summarize how each supports the evolution theory.
1. The Fossil Record
Absolute Dating
Determines absolute age in numbers
Performed by radioactive dating
Drawback - part of the fossil is destroyed during the test

11. Primate Fossils
Australopithecus Homo erectus Homo sapien

12. Australopithecus afarensis

13. Homo habilis = handy human 1.5 to 2 mya
Homo erectus 1.6 mya
Homo habilis = handy human 1.5 to 2 mya
bipedal

14. Cro-Magnon 35,000 to 40,000 ya Neanderthals 35,000 to 100,000 ya

15. (fully modern fossils 100,000 ya)
Modern Homo sapien
(fully modern fossils 100,000 ya)

16. Primate Brain Capacity

17. Primate Bone structure

18. 2. Geographic Distribution of Living Species
C) Summarize how each supports the evolution theory.
Beaver
2. Geographic Distribution of Living Species
Beaver
Muskrat
Beaver and Muskrat
Coypu
Capybara
Coypu and Capybara
NORTH AMERICA
Muskrat
Similar animals with different lines of descent
Similar environmental pressures result in similar species
Supports Struggle for Existence and Survival of the Fittest
Capybara
SOUTH AMERICA
Coypu

19. 3. Homologous Body Structures
C) Summarize how each supports the evolution theory.
Turtle
3. Homologous Body Structures
Alligator
Turtle
Primitive Fish
Structures that have different mature forms but develop from the same embryonic tissues
Supports Descent with Modification
Alligator
Bird
Bird
Mammals

20. Homologous Body Structures

21. Vestigial Organs traces of homologous organs in other species
Organ that serves no useful function

22. 4. Similarities in Embryology
C) Summarize how each supports the evolution theory.
4. Similarities in Embryology
In the early stages of development, different species look similar
Supports Descent with Modification = evidence of common ancestry.

23. STAR Question Which of the following embryos is the oldest
STAR Question Which of the following embryos is the oldest? Why do you think it is the oldest?
14 Days
11 Days
12 Days
10 Days

26. Understanding Check
1. Who or what chooses how organisms mate in artificial selection?
2. Who or what chooses how organisms mate in natural selection?
3. List the 4 pieces of evidence for evolution.
4. What is a worthless organ called?