Evolution Crossword

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Across
  1. 5. process by which evolution occurs; natural ______
  2. 6. the name of the ship that darwin traveled on
  3. 8. when organisms disappear from the earth
  4. 10. structures that are similar
  5. 13. proposed the theory of evolution by natural selection
  6. 14. structures that have no current function
Down
  1. 1. a characteristic that helps an organism survive
  2. 2. islands that Darwin visited
  3. 3. had different shaped beaks depending on the island they were from
  4. 4. change over time
  5. 7. preserved remains of ancient organisms
  6. 9. well-supported testable explanation
  7. 11. the name of Darwin's book; the ___ of species
  8. 12. natural selection is also known as the survival of the ______