Across
- 3. Theory of evolution that happens slowly
- 8. Similar organisms that can produce fertile offspring
- 10. tree Diagram that shows how scientists believe that different groups of organisms are related
- 12. dating A technique used to be able to tell what fossil is older
- 14. record Fossils that scientists have collected
- 15. A trait that helps an organism survive
Down
- 1. Differences between individuals of the same species
- 2. How well an organism survives in their environment
- 4. ancestry The last shared common ancestor on the branching tree of evolution
- 5. Preserved remains of an organism that lived in the past
- 6. A gradual change in species over time
- 7. darwin Theory that explains how organisms evolved over millions of years
- 9. Change in the genetic material of a cell
- 11. Set of information that controls a trait
- 13. No members of the species are alive