Across
- 6. the theory that species evolve during short periods of rapid change
- 7. a way to determine when an organism was around in time
- 12. a well-tested concept that explains a wide range of observations
- 13. a record of millions of fossils collected by scientist
- 14. changing your way of life to better live in your environment
- 15. when the population of a species is too big
Down
- 1. similar body parts across different species; provide evidence for common ancestor
- 2. survival of the fittest
- 3. the last shared common ancestor on the branching tree of evolution
- 4. a structure that is reduced in size and has little to no function
- 5. a scientist that proposed all organisms goal of life is to evolve and adapt
- 8. idea that over time older species evolved into new species
- 9. change in the genetic material of a cell
- 10. how well organisms can survive and reproduce in its environment
- 11. the theory that evolution occurs slowly but steadily