Across
- 4. 1 of the humans defences
- 7. microorganisms that cause disease
- 8. 1 of a plants defence mechanisms
- 9. 1 way diseases can spread
- 10. something doctors do when trialing new drug
Down
- 1. a disease spread from one organism to another
- 2. a medicine that does not contain the active drug being tested
- 3. dead or inactive pathogenic material used in vaccination to develop immunity to a disease in a healthy person
- 5. a damage caused by agrobacteriumtumefaciens bacteria
- 6. a type of pathogen