Across
- 3. an organism that lives in or on another organism (its host) and benefits by deriving nutrients at the host's expense
- 5. medical care given to a patient for an illness or injury
- 7. consisting of a single cell
- 8. the action of stopping something from happening or arising
- 9. a microscopic single-celled organism that has neither a distinct nucleus with a membrane nor other specialized organelles
- 12. a group of medicines used to kill or slow the growth of bacteria that cause disease
- 13. any member of a large group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms
Down
- 1. microscopic living organisms, usually one-celled, that can be dangerous (cause infection) or beneficial (such as in fermentation and in decomposition)
- 2. a preventive shot to yield immunity against a specific disease, usually employing a form of the disease agent in a weakened bacteria or viruses, to stimulate antibody production
- 4. a substance that is designed to kill microbes before they enter the body
- 6. an organism whose cells contain a nucleus surrounded by a membrane
- 10. a particle consisting of DNA encased in a protein coat that must inject its DNA into a living cell in order to reproduce. A microbe that consists of nucleic acid enclosed within a protein shell that requires a living cell in order to reproduce. Scientists consider the virus to be not alive
- 11. a chemical substance made by the body to help destroy an invading pathogen