Across
- 2. Made of chitin instead of cellulose of a plant wall cell.
- 4. passive immunity
- 8. Disorder in the function of a human
Down
- 1. Resistance to a disease
- 3. single-celled micro-organism , whose DNA is not enclosed in a nucleus.
- 5. Created by white blood cells
- 6. Infested by a disease
- 7. Special protein on the surface of a cell such as a pathogen.