| A | B |
|---|
| Virus | A small nonliving particle that invades and then reproduces inside a living cell. |
| Bacteria | Single celled organism that lack a nucleus. |
| Host | An organism that provides a source on energy or a suitable environment for a virus or parasite. |
| Protist | A eukaryotic organism that cannot be classified as an animal, plant, or fungus. |
| Eukaryote | An organism whose cells contain complex structures enclosed within membranes. |
| Prokaryote | A group of organisms whose cells lack a cell nucleus |
| Infectious Disease | A disease caused by the presence of a living thing in the body. |
| Microbe | A microscopic organism |
| Pathogen | A disease causing organism. |
| Binary Fission | A form of asexual reproduction on which one cell divides to form two identical cells. |
| Unicellular | An organism that consists of only one cell. |
| flagella | A long, whip like structure used for movement that extends out through the cell membrane and cell wall. |
| Cilia | The hair like projections on the outside of cells that move in a wavelike manner. |
