Across
- 2. time scale- Timeline of Earth’s history.
- 4. Change over time
- 6. Scientist that studies fossils.
- 8. selection- Nature provides the variation, and humans select those they find useful.
- 9. Inherited characteristics that increase an organism’s ability to survive and reproduce.
- 10. Preserved remains or traces of ancient organisms.
- 11. The ability of an individual to survive and reproduce in its specific environment.
- 12. selection- Process by which organisms with variations most suited to their environment survive.
- 14. Darwin- Developed a scientific theory of biological evolution that explains how modern organisms evolved.
- 15. record- Fossils of ancient organisms make up the history of life on Earth.
Down
- 1. structures- Structures that are shared by related species and have been inherited from a common ancestor.
- 3. One of the major divisions of the geologic time scale.
- 5. organ- Inherited from ancestors but have lost much or all of their original function.
- 7. A species that has died out.
- 13. structure- Body parts that share common function, but not structure; example = wings of a bee and wings of a bird
