1. To be successful today…
Pick up evolution booklet from blue table
Evolution Test: TOM 1/18; Review Sheet Due TOM 1/18
To be successful today…
BYOD Color of the day is Phones are in put away in backpacks

2. Warm-Up Tues 1/17
Read the scenario on the front of your review sheet and fill in the chart

3. Evidence for Evolution Recap…
1) Fossil Record
2) Homologous Structures
3) Analogous Structures
4) Vestigial Structures
5) Embryology
6) Genetic Comparisons

4. Warm-Up Thurs 1/12
1) In the chocolate bug lab, which bug was the mimic? Why?
2) How does mimicry increase an organism’s ability to survive and reproduce in its environment?
3) What would happen to the mimic species if it was NOT able to copy the model?

5. Warm-Up Fri 1/13 What are homologous structures? Give an example.
How do homologous structures show evolution?
What are analogous structures? Give an example.
Do analogous structures suggest a common ancestor? Why or why not?

6. Evidence for Evolution

7. 1. Fossil Record Age & Behavior patterns
Show changes in climate & geography

8. 1. Fossil Record Shows evolution & adaptation
Problems: Incomplete fossils & Imperfectly preserved

9. What similarities do you see among the forelimbs of these animals?
If you said “yes” then you just made a type of observation that scientists use to establish evolutionary relationships among organisms.

10. Homologous structures – similar internal structure found in different groups of organisms

11. Homologous structures
May or may NOT look the same on the outside
May have a different function
Shows common ancestor
Ex. forelimbs of vertebrates

12. What is a similar feature of these 2 organisms?

13. Analogous Structures
Structures w/similar function, but different internal structure
Any body part that is similar in function but different in structure is an analogous structure.

14. Shows evolution
But NOT by a common ancestor
Ex: wings – bats, insects, & birds

15. 3. Vestigial Structures Structures/organs that are no longer used
May have been used by ancestor
Indicate a change has occurred

16. Examples
Ostrich wings
Human appendix
Cave fish eyes

17. Warm-Up Fri 1/13 What are homologous structures? Give an example.
How do homologous structures show evolution?
What are analogous structures? Give an example.
Do analogous structures suggest a common ancestor? Why or why not?

18. To be successful today…
Pick up warm-up sheet from blue table
Pull out Evidence notes & booklet
Evolution Test: Wed 1/18; Review Sheet Due Wed 1/18
To be successful today…
BYOD Color of the day is Phones are in put away in backpacks

19. Similar Fossils in multiple layers
Fossil Record
Similar Fossils in multiple layers
Fossils that disappear

20. 5. Embryology
Many different animals have the same organs when they are embryos
Ex: embryos of fish, reptiles, birds & mammals all have gills.
Suggests evolution from a common ancestor
zebrafish chicken dog human skunk

21. Analyze Embryo Diagram
Which two organisms are most related?
Which two organisms are least related?

22. 6. Genetic Comparisons
Shows evolutionary relationships using DNA sequences
Ex. DNA sequence for ATP is the same for all living organisms
Ex. Homologous structures require similar DNA

23. Which Deer Species is most related to the common ancestor (#1)?

24. Which 2 species are most similar? Least similar?

25. Evolutionary Diagrams
Phylogenic trees and Cladograms –
Diagrams that shows evolutionary relationships of organisms based on similarities and differences in their physical or genetic characteristics.

26. Common Ancestor