Fossils Vocab

5. The science of the development of embryos from fertilization to birth.
9. Organisms that appear to be similar to species only known from fossils.
12. Structure that the Body parts of organisms are similar in structure and position, but are different in function.
13. The preserved evidence of the activity of an organism.
14. Remains, impressions, tracks or other evidence of ancient organisms.
15. Fossils of species that existed for a short time and can be used to date rocks.
16. Variation or differences among life forms.

1. An event that occurs when the last individual organism of a species dies.
2. Principle that states that the oldest rocks are on the bottom layers and younger rocks are on the top layers have been undisturbed.
3. Anatomy The study of similarities and differences among structures of living species.
4. Structure that the Body parts of organisms have lost its original function through evolution.
6. The impression of an organism in a rock.
7. Evolution The change over time in populations of related organisms.
8. Structure that the Body parts of organisms perform a similar function but differ in structure.
10. A fossil copy of an organism made when a mold of the organism is filled with sediment or mineral deposits.
11. Record of all the fossils ever discovered on Earth.