Across
- 4. fossils used to establish the relative age of rocks
- 6. structures that have different structure but same function
- 8. the process by which organisms change over time
- 9. scientist that wrote Principals of Geology and influenced Darwin
Down
- 1. how well an organism can survive and reproduce
- 2. any characteristic that increases and organism’s chance of survival
- 3. structures that may not look the same but share certain characteristics and a common ancestor
- 5. structures with reduced form or function
- 7. giant supercontinent that was formed 250 million years ago
- 10. scientist that that suggested that organisms can change during their lifetime