Evolution Crossword Puzzle

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Across
  1. 2. theory that evolution occurs slowly but Steadily
  2. 6. difference between same species
  3. 9. idea that overtime older species evolved into newer ones
  4. 13. theory that evolution occurs during small periods of fast change
  5. 14. how well an organism can survive in reproduce in its environment
Down
  1. 1. more offspring produced than can survive
  2. 3. raw material for evolution
  3. 4. theory that explains how modern organisms have evolved over time
  4. 5. can mate with each other
  5. 7. does not exist anymore
  6. 8. reduced in size and has very little or no function at all
  7. 10. provides evidence for common an common ancestor
  8. 11. last relevant predecessor
  9. 12. technique used to determine which two fossils are older based on rock layer they were found on
  10. 14. preserved remains