Across
- 2. provides active acquired immunity to a particular disease
- 8. a widespread outbreak of an infectious disease
- 9. a natural process that results in the survival and reproductive success of an organism best adapted to survive in their environment
- 10. a chemical substance that can cure bacterialinfections
- 12. a type of symbiosis in which one organism lives inside the other
- 13. single-celled rod-shaped organisms that reproduce by fission
- 14. any preserved evidence of an organism
Down
- 1. the process whereby the earth’s life changes over time
- 3. the condition in which an organism can resist disease
- 4. an epidemic that is geographically widespread
- 5. refers to a population of organisms that are separated
- 6. of or relating to a disease
- 7. the process in which new genetically distinct species evolve
- 11. a small infectious agent that replicates only inside the living cells of other organisms.