Natural selection

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Across
  1. 5. another name for natural selection survival of the______
  2. 6. of genes for faourable traits increase in the population
  3. 8. a central concept of evolution,idea of Charles Darwin: Natural_____
  4. 9. the evolution of ______in birds is an example of extremely long lasting adaptation.
Down
  1. 1. over time organisms _________to their environment
  2. 2. natural selection is the process where organisms with favourable traits are more likely to________
  3. 3. favourable traits passed on to next_________
  4. 4. Members of a -------are not all alike
  5. 7. artificial selection is selective____________