Natural Selection

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Across
  1. 6. hide or disguise the presence of.
  2. 7. English naturalist whose scientific theory of evolution by natural selection founded modern evolutionary studies
  3. 8. an explanation of some aspect of the natural world
  4. 10. of evolution that the distinguishable differences are due to modifications in successive generations.
  5. 11. natural selection the action or process of mutating
Down
  1. 1. a kind or sort
  2. 2. the action or process of adapting or being adapted.
  3. 3. an early proponent of the idea that biological evolution occurred and proceeded in accordance with natural laws
  4. 4. the action or process of mutating
  5. 5. a change in condition, amount, or level.
  6. 9. develop gradually, especially from a simple to a more complex form.