Across
- 4. have the same function but not the same structure
- 5. chance over time rather than sudden change
- 6. remains of organisms that become part of rock, bone, plants...
- 8. the ability to survive and reproduce
- 9. changes in traits over time
- 10. the rate of certain traits doesn't change
Down
- 1. remains of organisms that show that hey have common ancestor
- 2. body parts that have a similar structure
- 3. one of the genders selects the trait they wish to reproduce with
- 7. structures that were used by ancestors are no longer being used