| A | B |
|---|
| protist | eukaryotes that live in moist surroundings and are neither animals, plants nor fungi |
| protozoan | animal-like protists; most can move around |
| pseudopod | temporary bulges of the cell that help the protozoans move. Latin for "false foot" |
| contractile vacuole | a structure that collects and expels extra water from a cell |
| cilia | hairlike projections that help in movement and in sweeping food into the organism |
| symbiosis | a close relationship in which at least one of the species benefits |
| mutualism | a close relationship in which both of the species benefit |
| algae | plantlike protists |
| spore | a tiny cell that is able to grow into a new organism |
| pigment | a chemical that produces color |
| heterotroph | animals that must obtain food by eating other organisms |
| flagellates | protozoans that use long, whiplike structures to move; they may have one or more flagella |
| diatom | a unicellular organism |
