1. May 25, 2010 What is a phylogenetic tree?
2. Do you think your tree is exactly the same as the person next to you? Why or why not?

2. Rhesus
Gorilla
Chimp
Gibbon
Lemur
Orangutan
Spider
Squirrel

3. similarities and differences in
Comparative Anatomy
Evidence #2
similarities and differences in
anatomy of organisms

4. Body parts with similar structure but different functions
Likely inherited from a common ancestor

5. 5

6. structures that may have use in ancestor, but are no longer needed

8. Possible Human Vestigial Structures
Appendix
Tail
Wisdom Teeth
Ear Wiggling muscles
Cormorant
Cassiopea Project

9. Structures with the same function, but different structure
Not inherited from common ancestor
Develop due to similar environment/need

10. Embryology study of developing embryos
Homologous structures appear in embryos that don’t appear in adults.
suggest common ancestor

11. Comparative Embryology
Look at the picture  of the fish, reptile, bird, and mammal embryos. 
Do you see the similarities that exist? 

12. What is an EMBRYO?
- a multicellular eukaryote in its earliest stage of development (fertilization until birth)
-In humans, it is called an embryo from the moment of fertilization until the end of the 8th week, where after it is instead called a fetus.
Cassiopea Project

14. This embryo is about five weeks old.

15. 7 weeks

16. 8 weeks human embryo

17. 9-Week Human Fetus