Microorganisms

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Across
  1. 4. The complete destruction of microorganisms (13)
  2. 6. Chemicals used to kill microorganisms on living tissue (10)
  3. 8. The jelly-like substance inside a cell (10)
  4. 10. Killing microorganisms using heat (14)
  5. 12. Chemicals used to kill microorganisms on surfaces (13)
  6. 13. Organisms that grow best without oxygen (9)
  7. 14. Single-celled prokaryotic microorganisms (8)
  8. 15. Microorganisms that include yeasts and moulds (5)
  9. 17. The use of microorganisms to produce useful products (14)
  10. 18. A cell that contains a nucleus (10)
  11. 19. A disease-causing microorganism (8)
  12. 21. The rigid outer layer found in bacterial cells (8)
  13. 22. The genetic material found in bacteria (3)
  14. 24. Organisms that grow best in warm conditions (10)
Down
  1. 1. Reducing the number of microorganisms to safe levels (12)
  2. 2. The temperature at which an organism grows best (7)
  3. 3. The process by which bacteria reproduce (13)
  4. 5. Microscopic organisms that include bacteria, fungi, protoctista and viruses (14)
  5. 7. The study of microorganisms (13)
  6. 9. A substance produced by microorganisms to kill bacteria (10)
  7. 10. Eukaryotic microorganisms such as amoeba and paramecium (11)
  8. 11. Microorganisms that require a host cell to reproduce (7)
  9. 16. A cell that lacks a nucleus (11)
  10. 20. An organism that lives on or in another organism and causes harm (8)
  11. 23. Organisms that require oxygen (7)