G7 evolution

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Across
  1. 2. CHANGE OF GENEFIC COMPOSITION OVER TIME
  2. 3. :needs oxygen to survive
  3. 7. : 2 extremes survive
  4. 8. theory of natural selection
  5. 9. feed on others
  6. 10. only one extreme survive
Down
  1. 1. make their own food
  2. 3. doesn't need oxygen to survive
  3. 4. theory of catastrophism
  4. 5. theory of use and disuse
  5. 6. organisms with medium traits survive