Biology

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Across
  1. 3. adaptation that allows an animal to blend into its enviornment
  2. 4. theory that a species would slowly evolve over time through favorable mutations
  3. 6. one species can change over time to become two
  4. 7. our planet in its early years of volcanic activity
  5. 8. person who created the theory of acquired characteristics
  6. 10. same bone structure, different functions, shows common ancestor
  7. 12. theory that evolution occurs over a lifetime and changes with use/disuse
  8. 15. hypothesis that early rain and lightning created simple organic compounds to create life
  9. 16. person who theorized that evolution is due to natural selection
  10. 17. organ that is no longer in use
  11. 19. theory that life comes from other life
  12. 20. when two species evolve in response to each other
Down
  1. 1. period of no change followed by periods of rapid change
  2. 2. show constant change in a species
  3. 5. theory that life came from nothing
  4. 9. average trait is favored
  5. 11. one of the extreme traits is favored
  6. 13. same bone structure, same function, no common ancestor
  7. 14. states that several key organelles of eukaryotes originated as symbiosis between organisms
  8. 18. both extremes are favored