Across
- 3. A sphere
- 6. Not a cell wall
- 10. Unicellular
- 14. Live in extreme conditions
- 15. Causes the cell to burst
- 16. Not a capsid
- 17. A rod
- 19. Cause disease to host
- 20. A constant supply of oxygen
- 21. Consume
Down
- 1. Live without oxygen
- 2. copies virus indefinitely
- 4. A spiral
- 5. Cannot treat a viral disease
- 7. Make their own
- 8. Only in cell walls
- 9. The tower
- 11. Kills by using heat
- 12. Breakdown something
- 13. Best protection against diseases
- 18. Make a DNA copy of their RNA