Evolution

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Across
  1. 3. make more offspring
  2. 5. events happen by chance
  3. 7. mechanism by which evolution occurs
  4. 9. average trait is common
  5. 10. population decrease due to moving
Down
  1. 1. help an organism survive and reproduce
  2. 2. population size decrease due to a catastrophe
  3. 4. determined by the environment
  4. 6. father of evolution
  5. 8. no longer mate and make fertile offspring