Across
- 4. "the chemical of life"
- 6. data base of all known fossils
- 7. a fossil that has bean dated
- 8. a structure with no purpose
- 10. change in an organism that increases its chance of surival
- 11. idea, can be proven wrong
- 12. comparing body parts
- 13. shows structure of organisms that lived long ago
Down
- 1. old rock is deeper than new rock
- 2. similar structures
- 3. early stage of animal development before the fetus
- 5. survival of the "fittest"
- 9. something that is true and proven with rock hard solid evidence and can't be changed or proven wrong.