Survival of the Fittest

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Across
  1. 2. defined as the capacity to adapt
  2. 5. the number of factors that affect natural selection
  3. 7. characterized as 'descent with modification'
  4. 9. the early development stage of an organism
  5. 10. the separation of characteristics of an organism from the group
Down
  1. 1. the animal used by Lamarck to prove the Law of Use and Disuse
  2. 3. the man credited with the theory of evolution
  3. 4. contains preserved remains of plants and animals
  4. 6. any change in the genetic material of an organism
  5. 8. one of the factors that affect natural selection