biology unit 7

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Across
  1. 4. structures unused or useless body parts
  2. 7. theory organelles in eukaryotic used to be free living bacteri
  3. 10. same structure from common ancestor
  4. 11. study of development before birth
  5. 13. organisms traits help survive and reproduce those best fit
  6. 14. same function but different structure
  7. 17. evolution on a large scale in a long time
  8. 19. species mostly stay the same for a long time
  9. 20. method estimate how long ago species shared a common ancestor
Down
  1. 1. evolution on a small scale in a short time
  2. 2. species completely dies out
  3. 3. species evolves quickly to adapt
  4. 5. record fossils of past life found on earth
  5. 6. scientific naming system naming living organisms
  6. 8. two species evolving similar traits
  7. 9. control how an animal body develops
  8. 12. diagram showing relation of different organisms
  9. 15. group organisms classified together
  10. 16. trait in species not present in ancestors
  11. 18. first cell formed when sperm cell and egg cell join