Evidence of Evolution

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Across
  1. 4. gradual slow process
  2. 6. Darwin proposed the theory of Natural selection
  3. 8. record collection of fossils that show the timeline of life on Earth
  4. 10. a genetic variation that is helpful to the species
  5. 12. Error in DNA replication
Down
  1. 1. Variation Same species, Different traits
  2. 2. a rock that contains preserved parts
  3. 3. structure Organisms have similar bone or organ structures
  4. 5. Selection "survival of the fittest"
  5. 7. Comparison different species that are alive or extinct to find similarities and differences
  6. 9. fossil The remains of body parts
  7. 11. fossil Evidence of the activities of organisms