viruses

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Across
  1. 6. protein shell of virus
  2. 7. virus infecting and replicates within bacterium
  3. 10. abundant but too small to be seen without microscope
  4. 12. medicine used to fight of bacteria
Down
  1. 1. immunity to a certain virus
  2. 2. whip like structure allowing cells to move
  3. 3. organism that harbors a parasite
  4. 4. biological agent that causes a disease
  5. 5. causes mad cow disease
  6. 8. bacteria equivalent of sexual reproduction
  7. 9. single cell organisms' with no nucleus
  8. 11. hair like appendage