Across
- 3. A specialized protein that binds to an antigen and tags it for destruction
- 4. An organism, virus, or protein that causes disease
- 6. Tiny particles that have their own genetic material but depend on living things to reproduce
- 8. An organism that lives and feeds on another organism
- 10. Disease caused by heredity or environmental factors
Down
- 1. A disease caused by a pathogen
- 2. Some are helpful to living things and some cause disease
- 5. The ability to resist or recover from an infectious disease
- 7. Made up of tissues and specialized white blood cells that attack foreign substances in the body
- 9. They decompose, or break down dead plants and animals for use by other organisms