| A | B |
| algae | plantlike protists |
| binary fission | a form of asexual reproduction in which one cell divides to form two intdentical cells |
| binomial nomenclature | the naming system for organisms in which each organism is a two-part name-- a genus name and a species name |
| budding | a form of asexual reproduction in which a new organism grows out of the body of a parent |
| cilia | the hairlike projections on the outside of cells that move in a wavelike manner |
| classification | the process of grouping things based on their similarities |
| conjugation | the process in which a unicellular organism transfers some of its genetic material to another unicellular organism |
| decomposer | an organism that breaks down large chemicals from dead organisms into small chemicals and returns important materials to the soil and water |
| endospore | a small, rounded, thick-walled, resting cell that forms inside a bacterial cell |
| flagellum | a long, whiplike structure that helps a unicellular organism move |
| genus | a classification grouping that consists of a number of similar, closely related species |
| host | an organism that provides a soure of energy or a suitable environment for a virus or for another organism to live |
| hyphae | one of the branching, threadlike tubes that make up the body of a fungus |
| parasite | an organism that lives on or in a host and causes harm to the host |
| protozoan | an animal-like protist |
| pseudopod | a "false foot" or temporary bulge of the cell membrane used for feeding and movement in some protozoans |
| species | a group of similar organisms whose members can mate with one another and produce fertile offspring in nature |
| spore | a tiny cell that is able to grow into a new organism |
| taxonomy | the scientific study of how living things are classified |