Natural Selection

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Across
  1. 2. unit that determines a particular characteristic in an organism
  2. 5. the preserved remains or impression of a plant or animal
  3. 6. to continue to live or exist
  4. 8. a distinguishing feature belonging to an organism
Down
  1. 1. he proposed the theory of evolution by natural selection
  2. 3. to gradually develop
  3. 4. a group of organisms that belong to the same species or are living in the same area
  4. 7. a difference in individual species
  5. 9. the ability of an organism to alter their structure or function to better suit its environment
  6. 10. a set of statements or ideas intended to explain a topic or phenomena