| A | B |
|---|
| protist | An organism that belongs to the kingdom Protista. |
| parasite | An organism that feeds on an organism of another species (the host) and that usually harms the host; the host never benefits from the presence of the parasite. |
| host | An organisim from which a parasite takes food or shelter. |
| algae | Eukaryotic organisims that convert the sun's energy into food through photosynthesis but that do not have roots, stems, or leaves. |
| phytoplankton | The microscopic, photosynthetic organisms that float near the surface of marine and fresh water. |
| protozoa | Protists that are mobile |
| eukaryotic | A cell with a nuclues |
| slime molds | A heterotrophic protist that can move only at certain phases in the life cycle. They look like thing, colorful, shapeless globs of slime. Decomposers. |
| spores | A reproductive cell or multicellular structure that is resistant to stressful environmental conditions and that can develop into an adult without fusing with another cell. |
| diatoms | Single celled organisms found in both salt water and fresh water. They make up a large percentage of phytoplankton. |
| dinoflagellates | Single-celled organisms that live in slat water mostly, and have two whiplike strands called flagella. |
| flagella | A whiplike part that helps with movement. |
| euglenoids | Single-celled protists, who mostlt live in fresh water. Can be either a producer or decomposer. |
| amoeba | A soft, jellylike protozoan that can be found in fresh and salt water, soil and as parasites in animals. Shapeless but highly structured cells. |
| pseudopodia | "False feet." An amoeba uses this false foot to move about. |
| food vacuole | Food enters through this area, where enzymes digest the food. |
| radiolarians | Protozoan that has a shell that looks like a glass ornament. |
| Paramecium | A large organism that moves and feeds with cilia. |
| macronucleus | A large nucleus that controls the functions of the cell. |
| micronucleus | A smaller nucleus that passes genes to another cell during sexual reproduction |
| conjunction | A sexual reproduction process in which tow individuals join together and exchange genetic material but using a small, second nucleus, the micronucleus. |
| heterotrophs | An organism that cannot make its own food; that gets food by eating other organisms or their byproducts and that cannot make organic compounds from inorganic materials. |
| cilia | Tiny, hairlike structures that move a protist forward by beating back and forth. |
