| Term | Definition |
|---|
| Protist | a eukaryotic organism that cannot be classified as an animal, plant or fungus |
| Algae | plantlike protists |
| Pigment | a chemical that produces color |
| Spore | a tiny cell that is able to grow into a new organism |
| Cilia | the hairlike projections on the outside of cells that move in a wave-like manner |
| Psuedopod | a "false foot" or temporary bulge of cytoplasm used for feeding and movement in some protozoans |
| Bacteria | single-celled organisms that lack a nucleus; prokaryotes |
| Archaebacteria | oldest bacteria; no nuclei |
| Eubacteria | most bacteria; no nuclei |
| Heterotroph | an organism that cannot make its own food |
| Autotroph | an organism that makes its own food (a) |
| Eukaryotes | an organism whose cells contain nuclei |
| Prokaryotes | an organism whose cells lack a nucleus and some other cell structures |
| Flagella | a long, whip-like structure that helps a cell to move |
| Producers | organisms that make their own food (p) |
| Contractile Vacuole | the cell structure that collects extra water from the cytoplasm and then expels it from the cell |
| Chloroplast | a plant cell structure in which photosynthesis occurs |
| Photosynthesis | the by which plants and some other organisms capture and use light energy to make food from carbon dioxide and water |
| Virus | a tiny, nonliving particle that invades then reproduces inside a living cell |
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