Natural Selection

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Across
  1. 6. ship Darwin sailed on
  2. 9. Darwin studied
  3. 10. the struggle among living things
Down
  1. 1. species produce offspring
  2. 2. process which individuals are better adapted to their environment that should survive
  3. 3. father of evolution
  4. 4. differing in size, shape, and or color
  5. 5. when oxygen levels get low
  6. 7. classified life structure
  7. 8. an inherited trait