| A | B |
|---|
| protist | unicellular eukaryotic organism belonging to the kingdom Protista |
| Endisymbiont Hypothesis | theory proposed by Lynn Margulis that states that the first eukaryotic cell was formed from a symbiosis among several prokaryotes |
| Ciliophora | phylum containing solitary and colonial ciliates |
| ciliate | protist that has many hairlike structures that aid in movement |
| cilium | short hairlike projection that produces movement in many cells |
| paramecium | unicellular slipper-shaped ciliate protist |
| pellicle | complex living outer layer of certain protists |
| trichocyst | flask-shaped structure in the pellicles of some protists used to defend and anchor the organism |
| macronucleus | larger of two types of nuclei in ciliates, which controls the life process of the cell |
| micronucleus | small nucleus in ciliates that undergoes meiosis and mitosis during conjugation and contains more genes than the macronucleus |
| gullet | indentation on one side of a paramecium that brings food from the outside to the interior of the cell |
| food vacuole | membrane-enclosed cavity in protists in which food is digested |
| anal pore | structure in paramecium and certain other protists through which waste materials are emptied into the environment |
| contractile vacuole | structure in some protists that collects water and discharges it from the cell |
| Zoomastigina | phylum consisting of animallike protsits that move through the water by means of flagella |
| flagellum | long, whiplike projection that aids in movement in some cells |
| flagellate | organism that has taillike structures that aid in movement |
| Sporozoa | phylum containing non-motile parasitic protists |
| Sarcodina | phylum that contains protists that use pseudopods to move and feed |
| pseudopod | fingerlike projection of cytoplasm used for movement and feeding |
| ameba | flexible active cell without cell walls, flagella, or cilia that moves by means of pseudopods, reproduces by binary fission, and belongs to he phylum Sarcodina |
| Euglenophyta | phylum that contains plantlike protists that move by means of flagella and have chloroplasts |
| euglena | cell belonging to the phylum Euglenophyta that contains chlorophyll and has a pouch that contains two flagella at its front end |
| Pyrrophyta | phylum containing protists known as dinoflagellates |
| dinoflagellate | protist belonging to the phylum Pyrrophyta that typically is photosynthetic, moves by means of two flagella, and reproduces by binary fission |
| Chrysophyta | phylum containing yellow-green algae, golden-brown algae, and diatoms |
| diatom | photosynthetic cell belonging to the phylum Chrysophyta that produces intricate cell walls rich in silicon |
| slime mold | protist that is amebalike at one stage of its life and at other stages produces moldlike masses that give rise to spores |
| Acrasiomycota | phylum containing cellular slime molds |
| Myxomycota | phylum containing acellular slime molds |
| plasmodium | mass of cytoplasm that contains many nuclei, such as the structure produced by acellular slime molds that contains thousands of nuclei enclosed in a single cell membrane |
| bloom | enormous growth of algae, protis, and other organisms that results if too much waste is present in a body of water |
| phytoplankton | any small photosynthetic organism found in great numbers near the surface of the ocean |
