Across
- 2. the smallest unit that can live on its own
- 4. viruses that infect and replicate only in bacterial cells
- 9. an infection of the nose, throat,and lungs, which are a part of the respiratory system
- 10. a very simple microorganism that infects cells and may cause diseases
Down
- 1. A large group of single-cell microorganisms
- 3. lung inflammation caused by being to cold
- 5. a biological catalyst and is almost always a protein
- 6. an individual animal,plant, or single celled life form
- 7. a thin sheet of tissue or layer of cells acting as a boundary
- 8. a group of atoms bounded together