Across
- 6. substances from weakened pathogens introduced to body to grow immunity
- 10. multicellular organisms that obtain energy and nutrients from dead matter
- 12. prokaryotic single-celled organisms
- 13. science that explores microscopic organisms
- 15. an Illness that shows up more than would normally be expected
- 16. one parent making offspring which are genetically identical to them
- 18. organism which feeds on host and either live or are in the host's body
- 20. unicellular organisms which lack tissue differentiation
Down
- 1. viral diseases are most widespread illnesses in humans caused by viruses
- 2. an agent which can induce or increase the frequency of mutation in organisms
- 3. something easily passed from one organism to another
- 4. A single-celled organism
- 5. a disease that affected people worldwide rather than in one region
- 7. caused by a pathogen and very contagious
- 8. living things which cause human diseases
- 9. Chemical which kills bacteria or slows growth
- 11. non-living particles that need host cell to reproduced
- 14. an infected organism where the disease agent grows and reproduces
- 17. an organism of many cells
- 19. animal-like protists