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Protists
| Term | Definition |
|---|---|
| protist | a eukaryote that cannot be classified as a plant, animal or fungus |
| protozoan | animal-like protist |
| pseudopod | "false foot"; a temporary extension of cytoplasm |
| contractile vacuole | an organelle that collects and expels excess water; helps maintain the organism's osmotic balance |
| algae | plant-like protists; have no true roots, stems or leaves |
| spore | in protists, a reproductive unit that can form a new individual; may be motile |
| dinoflagellate | plant-like protist that moves with flagellum; some are bioluminescent; causes red tide poisoning |
| diatom | unicellular plant-like protists with shells made of silica |
| brown algae | - marine protist with special bladders to float to the surface and move around; includes kelp (large seaweed) |
| fungus-like protists | protists that share characteristics of fungi and live in moist, shady places |
| plasmodial slime molds | saprophytic fungus-like protists that live as a large mass of cytoplasm with many nuclei |
| water molds | filamentous fungus-like protists; may be parasites; attack some food crops |
| colonial | unicellular organisms that live and work together, e.g. Volvox |
| endosymbiosis | a theory explaining the evolution of mitochondria and chloroplasts, beginning with one organism living inside another organism |
| saprobe/saprophyte | secretes digestive enzymes into dead or decaying matter, then absorbs nutrients |
| parasite | an organism that lives in or on a host |
| motile | being able to move |
| pathogen | a virus or microbe (bacteria, fungi or protist) that causes disease |
| conjugation | exchange of genetic material (in a second nucleus) between two protists; a type of sexual reproduction |
| gametic reproduction | joining of two gametes (sex cells) from two protists to form a fertilized |
| phytoplankton | free-living aquatic organisms that form the base of marine and freshwater food webs |
| filamentous | a plant-like protist body plan in which cells are joined end to end |
| fruiting body | a fungus-like reproductive structure in some fungus-like protists |
| radiolarian | a protozoan with a shell, often made of silica |
| zooflagellate | a protozoan with flagella |
| pellicle | a thin, flexible layer of protein protecting the cell membrane |
| sporozoan | a protozoan that cannot move |
| cellular slime molds | saprophytic fungus-like protists that live individually; in unfavorable conditions they live as a group |
| eyespot | light-sensitive organelle in some protists |
Created by:
onceamustang
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