Evolution

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Across
  1. 9. survival of the fittest
  2. 11. selective breeding for desired traits
  3. 13. geographic distribution of species
  4. 14. mutation that causes different colored eyes
  5. 16. important for diversity (even among siblings)
  6. 17. change in genetic sequence
  7. 18. similar organisms that produce offspring
  8. 19. bones that have been preserved and fossilized
  9. 20. birds studied by Darwin in the Galapagos Islands
Down
  1. 1. structures that are similar in different species
  2. 2. boat darwin sailed on
  3. 3. no longer living
  4. 4. creating of new species
  5. 5. small sequences in DNA
  6. 6. came up with the idea of natural selection
  7. 7. an organism in its earliest stages of development
  8. 8. structure that is present but no longer needed
  9. 10. study of body structure
  10. 12. humans have 23 pairs of ________
  11. 15. factors like radiation and _______ can cause mutations