natural selection

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Across
  1. 3. the action or process of adapting or being adapted.
  2. 5. difference in condition, amount, or level, typically with certain limits.
  3. 6. of military personnel, equipment, and installations by painting or covering them to make them blend in with their surroundings
  4. 9. biology postulating that the various types of plants animals and other living things on Earth
  5. 10. natural selection as an explanation
Down
  1. 1. he action or process of mutating.
  2. 2. first presented in 1801
  3. 4. develop gradually, especially from a simple to a more complex form
  4. 7. a group of living organisms consisting of similar individuals
  5. 8. receive (money, property, or a title)