| A | B |
|---|
| protist | any eukaryote that is not a plant, an animal, or a fungus |
| pseudopod | a projection of cytoplasm, or false foot, used by some protists for feeding or movement |
| amoeboid movement | the type of locomotion used by amoebas |
| food vacuole | a small cavity in the cytoplasm of protists that temporarily stores food |
| cilium | a short hairlike projection similar to a flagellum; produces movement in many cells |
| trichocyst | small, bottle-shaped structures used for defense by paramecia |
| macronucleus | the larger of the ciliate's two nuclei, contains multiple copies of most of the genes that the cell needs in its day-to-day existence |
| micronucleus | the smaller of the ciliat's two nuclei; contains a "reserve copy" of all of the cell's genes |
| gullet | an indentation in one side of a ciliate that allows food to enter the cell |
| anal pore | the region of the cell membrane of a ciliate where waste-containing food vacuoles fuse and are then emptied into the environment |
| contractile vacuole | a cavity in the cytoplasm of some protists that collects water and discharges it from the cell |
| conjugation | a form of sexual reproduction in which paramecia and some prokaryotes exchange genetic information |
| accessory pigment | a compound other than chlorophyll that absorbs light a different wavelengths than chlorophyll |
| eyespot | a group of cells that can detect changes in the amount of light in the environment |
| pellicle | the cell membrane in euglenas |
| phytoplankton | a population of algae and other small, photosynthetic organisms found near the surgace of the ocean and forming part of plankton |
| phycobilin | accessory pigment found in red algae that is expecially good at absorbing blue light |
| filament | in algae, a long threadlike colony formed by many green algae |
| alternation of generations | a process in which many algae switch back and forth between haploid and diploid stages of their life cycles |
| gametophyte | a haploid, or gamete-producing, phase of an organism |
| spore | a haploid reproductive cell |
| sporeophyte | a diploid, or spore-producing, phase of an organism |
| cellular slime mold | slime mold whose individual cells remain separated during every phase of the mold's life cycle |
| acellular slime mold | slime mold that passes through a stage in which its cells fuse to form large cells with many nuclei |
| plasmodium | a structure with many nuclei formed by acellular slime molds |
| hypha | the tiny filament that makes up a multicellular fungus or a water mold |
| zoosporangium | spore case |
| antheridium | the male reproductive structure in some algae and plants |
| oogonium | a specialized structure formed by hyphae that produces female nuclei |
