Across
- 4. extinction occurs at a slow rate
- 5. study of physical structures
- 7. slow change over a long period of time
- 10. study of how and why species live where they live
- 12. evolution different species evolve similar characteristics because they live in similar environments
- 15. preserved remains of an animal; bones, shells, imprints
- 17. extinction >50% of all species die, catastrophic event
- 18. Feature that allows and organism to better survive in its environment
- 19. movement of genes into/out of a population
- 20. structure same structure different function
- 21. two organisms change in response to one another and for a specialized relationship
- 22. population where allele frequency doesn't change, not real
- 23. process of biological change that makes descendants different from ancestors
- 24. study of embryos and their development
Down
- 1. with modification change in gene frequency over time, beneficial traits become more common
- 2. branch of science that explores the chemical processes within living organisms
- 3. some organisms survive and reproduce better than others
- 6. structure similar function, different anatomy
- 8. evolution number of different species arise from one ancestor
- 9. formation of a new species by evolution
- 11. study of prehistoric life
- 13. structure little to no function to organism, was useful to ancestor species
- 14. select traits not useful for survival but without them won't be chosen as a mate
- 16. all genes in a population of a species