Evolution Crossword Puzzle

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Across
  1. 2. may occur as a response to changes in abiotic factors
  2. 3. an organism's ability to survive and reproduce
  3. 6. the classification of organisms
  4. 8. preserved impression/remains of a prehistoric organism
  5. 9. the ingestion of bacteria
  6. 15. feature of behavior that no longer seems to have a purpose
  7. 16. live on earth originated from microorganisms
  8. 18. the process whereby organisms better adapted to their environment tend to better survive
  9. 20. nitrogenous organic compounds composed of amino acids
  10. 21. skeletal elements of organisms that suggest a connection to a common ancestor
  11. 22. structures that are similar in unrelated organisms
Down
  1. 1. the identification by humans of desirable traits in the plants and animals
  2. 4. organic compounds occurring in foods and living tissues that must include sugars, salts, and cellulars
  3. 5. ________ nomenclature
  4. 7. influence of closely related species on each other
  5. 10. is also known as gene migration or allele flow
  6. 11. believes organelles in eukaryotic cells were once prokaryotic micros
  7. 12. organism that grows without air
  8. 13. changing of a structure of a gene resulting in a variant form that may be transmitted to future generations
  9. 14. process where organisms not closely related independently evolve similar traits
  10. 17. _________ equilibrium
  11. 19. organic compounds that are fatty acids