| Term | Definition |
| spore | tiny cell that grows into a new organism |
| protozoans | single-celled eukaryotes that cannot make their own food |
| algae | protists that use the sun's energy to make their own food |
| cilia | hair-like structure that move the organism and sweep food into the organism |
| protists | eukaryotes or living things whose cell has a nucleus |
| pseudopod | temporary bulge of a cell which is cytoplasm that goes in one direction and the rest of the organism follows |
| autotroph | makes its own food |
| pigment | chemical that produces color in algae |