Across
- 1. nitrogenous organic compounds composed of amino acids
- 6. structures that are similar in unrelated organisms
- 8. preserved impression/remains of a prehistoric organism
- 10. selection the process whereby organisms better adapted to their environment tend to better survive
- 11. structures skeletal elements of organisms that suggest a connection to a common ancestor
- 14. organism that grows without air
- 16. structures feature of behavior that no longer seems to have a purpose
- 17. evolution may occur as a response to changes in abiotic factors
- 19. influence of closely related species on each other
Down
- 2. the classification of organisms
- 3. selection the identification by humans of desirable traits in the plants and animals
- 4. theory- believes organelles in eukaryotic cells were once prokaryotic micros
- 5. equilibrium hypothesis that evolutionary development marked by isolated episodes of rapid speciation between long periods of little or no change
- 7. organic compounds occurring in foods and living tissues that must include sugars, salts, and cellulars
- 9. live on earth originated from microorganisms
- 12. the ingestion of bacteria
- 13. an organism's ability to survive and reproduce
- 15. nomenclature two terms used to denote a species of living organisms
- 18. evolution process where organisms not closely related independently evolve similar traits
- 20. organic compounds that are fatty acids