natural selection

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Across
  1. 2. develop gradually
  2. 6. helped develop evolution
  3. 7. a change or difference in condition
  4. 11. the process whereby organisms better adapted to their environment tend to survive and produce more offspring
  5. 12. the action or process of adapting
Down
  1. 1. statement of species changing over time
  2. 3. a group of living organisms that are similar
  3. 4. the action or process of changing
  4. 5. a theory of evolution based on the principle that physical changes in organisms during their lifetime
  5. 8. well-substantiated explanation of an aspect of the natural world that can incorporate laws, hypotheses and facts
  6. 9. transmission of genes from parents
  7. 10. hidden or disguise