Urbanisation leads to change in type of bacteria

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Across
  1. 2. important
  2. 5. search
  3. 8. person who studying biology
  4. 9. very large number
  5. 10. biological cell
  6. 11. following
  7. 13. germs
Down
  1. 1. group
  2. 3. far away
  3. 4. most common
  4. 6. people who study science
  5. 7. first / introductory
  6. 12. natural environment