Across
- 3. dealing with viruses and one-celled organisms
- 4. Spreading rapidly to a great many individuals in a locality
- 7. Tiny reproductive body consisting of one or more cells
- 9. A natural process of evolution
- 12. Any of the simplest forms of animal life
- 13. An abnormal physical or mental condition
Down
- 1. Any large group of submicroscopic agents that reproduce only in living cells
- 2. science concerned with promoting health and preventing illness
- 3. Any microscopic life form such as a bacterium, protozoan, or virus
- 5. Any organism that causes disease
- 6. An animal or plant that live in or on another organism and drains sustenance from it
- 8. A specimen of modified, killed, or avirulent viruses or bacteria
- 10. Various substances derived from fungi or other organisms
- 11. The child, young, or descendant of a particular parent or ancestor