evolution and taxonomy

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Across
  1. 1. _____ structure; same function, different ancestry.
  2. 2. _____ structure; leftover, unused trait.
  3. 5. Change in a species over time.
  4. 7. Can interbreed, fertile offspring.
  5. 10. Classifying and naming organisms.
  6. 11. Best-suited traits survive.
Down
  1. 1. Trait that aids survival.
  2. 3. Shared evolutionary relative.
  3. 4. Formation of new species.
  4. 6. All alleles in a population.
  5. 8. Preserved remains of past life.
  6. 9. _____ structure; same ancestry, different use.