Across
- 4. Changes over time of organisms
- 6. dating method of aging rocks and or fossiles
- 7. remains of old generations' bones
- 9. structure is something important
- 10. fossils distinctive fossils
- 11. heritable characteristics that increase an organism's ability to survive
Down
- 1. process by which organisms that are most suited for the environment survive
- 2. structure structures that are similar
- 3. something
- 5. refers to an individuals
- 8. how well an organism can survive