Across
- 1. Microbe that causes disease
- 2. Small piece of circular DNA
- 3. Cells with a thick wall and one membrane
- 6. Cells with a thin wall and two membranes
- 7. Main cell of humoral immunity
- 9. CD4+ cell in immune system
- 10. Virus that causes the flu
Down
- 1. Parasite that causes malaria
- 4. Target of beta-lactam antibiotics
- 5. Virus that causes smallpox
- 8. Virus that infects bacteria