Microbiology

4. - A small, circular piece of DNA that can replicate independently of the chromosomal DNA.
5. - A diverse group of single-celled organisms that can be found in soil, water, and other environments.
10. - Single-celled microorganisms that can be found in a variety of environments.
11. - A laboratory technique that involves growing microorganisms on a nutrient medium.
13. - A gelatinous substance used as a culture medium for microorganisms.
14. - A diverse group of microorganisms that includes yeast and molds.
15. - A substance that triggers an immune response.

1. - The ability of an organism to resist infection or disease.
2. stain - A laboratory technique used to differentiate bacteria into two types based on their cell wall structure.
3. - A microorganism that causes disease in its host.
6. - A medicine that inhibits the growth or destroys bacteria.
7. - The invasion and multiplication of pathogenic microorganisms in a host organism.
8. - A microorganism, especially a bacterium that causes disease or fermentation.
9. - A small infectious agent that replicates only inside the living cells of other organisms.
12. - An organism that lives on or within another organism and benefits at the host's expense.