NATURAL SELECTION

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Across
  1. 3. a slight difference
  2. 7. Selection, the process leading to evolution
  3. 8. the gradual development of a species
  4. 9. a community of animals, plants or people
  5. 11. developing in a similar direction
  6. 13. the set of genes in our DNA responsible for a specific trait
Down
  1. 1. the ability to live
  2. 2. developing in different directions
  3. 4. the production of offspring
  4. 5. the process of change through which an animal becomes better suited to the environment
  5. 6. Darwin, the man famous for his work on natural selection
  6. 10. the physical expression of a gene
  7. 12. the changing structure of a gene