Evolution Review

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Across
  1. 3. a structure no longer needed by an organism
  2. 5. comparing similarities in embryonic development
  3. 8. remains of living organisms
  4. 10. when a big population goes to a very small one
  5. 11. to make a new species
  6. 12. a structure that several species share but have different functions
Down
  1. 1. the distribution of organisms
  2. 2. differences, variety, many different forms
  3. 4. a structure that has the same function, but different structure
  4. 5. change over time
  5. 6. trait that increases the ability to survive
  6. 7. ability to reproduce fertile offspring
  7. 9. genes available for intermixing in a population