Biology Chapter 15

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Across
  1. 3. traces of homologous organs
  2. 4. structures that have different mature forms
  3. 6. change over time
  4. 7. compete regularly for necessities
  5. 8. testable evidence
  6. 10. normal breeding
  7. 12. select for breeding
  8. 13. common ancestors of all living things
Down
  1. 1. find a way to survive
  2. 2. survive and reproduce most successfully
  3. 5. look different from their ancestors
  4. 9. preserved remains
  5. 11. get use to