Biology Crossword

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Across
  1. 2. a chemical marker on the surface of the cell that identifies the cell
  2. 3. a change to the body that happens during a disease
  3. 5. a quantity that is changed in an experiment
  4. 8. an organism that causes diseases
  5. 9. to make impure by the addition of unwanted microbes or chemicals
  6. 14. completely free of microbes
  7. 15. a group of identical cells
Down
  1. 1. a condition that affects the functioning of the body
  2. 4. a liquid made by dissolving a solute in a solvent
  3. 6. an area without microbes
  4. 7. condition caused when a microbe enters the human body and multiplies
  5. 10. a chemical used to reduce pain
  6. 11. a disease passed on by indirect contact
  7. 12. a substance that kills microbes
  8. 13. decrease the concentration of a solute in a solution