1. Describe the ideal environment for this species of moth.

2. How many moths do you see?

3. A B
The picture above shows black and white moths in 2 different environments (A & B).
In each environment, which color is most likely to survive?
If in environment A there were 20 black and 50 white moths, what would
happen to the moth populations if all of a sudden the tree bark turned black like in B?

4. Mrs. Workman, do you have proof of Evolution?
1. DNA homology, Amino Acid homology
Looking at the number of base differences
2. Embryology
Comparing developing organisms
3. Geographic distribution of organisms
Australia
4. Fossil record
A piece of organism or imprint left behind.
Fossils show that species have changed over time
5. Vestigial structures
Body structures that have shrunken and are not used anymore. Ancestors had a use for them
6. Homologous structures
Structures that share a common ancestry and look/behave similarly.

5. DNA/Amino Acid Homology
(Means the same!)
DNA/Amino Acid Homology
Human ’A-T-C-T-T-A-C-G-A-A-T-C-A-T-G-C-C-C-T-A-A-C-T-T-C-G-G-C-A-T-T-A-C-G-C-T-A-G-C-3’
Whale ’A-C-C-T-T-A-C-C-A-A-T-C-A-T-T-C-C-C-T-A-A-C-T-T-A-G-G-C-A-T-T-A-C-G-C-T-A-G-C-3’
Frog ’A-C-C-A-T-G-C-G-T-G-T-C-A-T-C-C-C-C-G-A-G-C-T-T-C-G-G-T-A-T-T-A-C-G-C-A-A-G-C-3’
Gorilla ’A-T-C-T-T-A-C-G-A-A-T-C-A-T-G-C-C-C-T-A-A-C-A-T-C-G-G-C-A-T-T-A-C-G-C-T-A-G-C-3’

6. Embryology

7. Fossils

8. Geologic Strata and Carbon Dating
Defining age of fossils!
Geologic Strata and Carbon Dating
Strata
Determining relative age of a fossil based on its location in rock layers
Carbon-14
Used to date any object composed of carbon
Radioactive carbon decays over time
check amount of C14 left in sample, enabling you to tell age of object

9. Did you know that whales have feet?
Well, sort of….

10. Fossils help us determine whale evolution
60 million
years ago
50 million
years ago
40 million
years ago
Yesterday

11. Vestigial Structures
Human tail-bone, wisdom teeth, appendix (they have no current purpose)
Snake pelvis
Whale feet

12. Homologous Structures
Limb adapted to function
means the same!

13. PBS Movie – 5 min