1. Copy 89 Evolution Notes pt 2
90-91 Analogous, homologous, vestigial reading
92 Pg 221 Q’s and Ans.s #6-9
93 Embryology W/s

3. Evolution part 2

4. Darwin’s Argument
We are the descendants of an common ancient ancestral organism.

5. Common descent
All living organisms descend from one common ancestor

6. Embryology
Study of gametes, embryo and fetal development.

7. Descent with modification
Passing on traits to offspring changes them little by little

9. Homologous Structures
Similar structures that evolved from a common ancestor.
The organ or bone have similar function and make up

10. Analogous Structures
Morphological differences in species that have the same appearance, structure or function but have evolved separately from other species
They do not share common ancestor

12. Vestigial Organs
Organs that don’t serve a major function in future descendants