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