Across
- 1. rock layers
- 4. an example would be human tailbones
- 9. physical features shared due to a common ancestor
- 13. argument with all species descended from common ancestors
- 14. organisms in a population adapt to their environment
- 15. a fossil's age compared to other fossils
- 16. diagram that represents evolutionary relationships among organisms
- 17. biology concerned with the study of embryos
- 18. descendant's of a common ancestor evolve independently
- 21. diversification of a single ancestor into new species
- 22. individuals that pass on more greater genes
Down
- 2. inheritable traits
- 3. shows evidence of descent with modification
- 5. change in inherited characteristics
- 6. similar features that evolved independently in organisms because of shared environment
- 7. known as selectively breeding
- 8. changes in traits in population over time
- 10. biology that deals with geographical distribution of plants and animals
- 11. uses radiometric dating to determine time since formation of the rock and surrounding it.
- 12. different species evolve similar traits
- 19. sudden geologic catastrophes causing extinction of large groups or organisms
- 20. two or more species evolve together