evolution

3. similar body parts from the same common ancestor
4. when a catastrophe accrues and kills a large random portion of a species which changes the allele frequency
6. the study of embryos that shows that embryos with common ancestors have similar traits
8. bones you find in the ground that show evolution over time
9. body parts that are NOT from a common ancestor but look verry similar
11. body parts that are no longer needed but use to sever a purpose in an ancestor
12. when species who are more related have more DNA in common

1. when someone observes evolution over time
2. the portion of the species more fit for the environment will have a higher survival rate, creating offspring that's more successful
5. a tree that shows species evolving new traits over time becoming new species
7. when species gain a trait purely to attract a mate
10. process of evolution