Chapter 7: The Protists
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| Algae | an organisms in the kingdom Protista that performs photosynthesis
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| Amoeba | a protozoan that undergoes a crawling movement by forming cytoplasmic projections into the environment.
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| Apicomplexan | a protozoan containing a number of organelles at one end of the cell that are used for host penetration
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| Autotroph | referring to an organism that uses carbon dioxide as a carbon source
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| Bioluminescent | the emission of light by a living organism in which the light is produced by an enzyme-catalyzed chemical reaction during which chemical energy is converted to light energy
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| Cellular slime mold | a member of the protists that exists as amoeboid cells, which aggregate into a multicellular “slug”
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| Ciliate | A protozoan that moves with the aid of cilia
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| Cilia | Hair-like projections on some eukaryotic cells
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| Conjugation | in the protozoan ciliates, a sexual process involving the reciprocal transfer of micronuclei between cells in contact
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| Contractile vacuole | a membrane-enclosed structure within a cell’s cytoplasm that regulates the water content by absorbing water and then contracting to expel it
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| Cyst | a dormant and very resistant form of a protozoan and multicellular parasite
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| Definitive host | an organism that harbors the adult, sexually mature form of a parasite
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| Diatomaceous earth | filtering material composed of the remains of diatoms
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| Diatom | one of a group of microscopic marine algae that preforms photosynthesis
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| Dinoflagellate | a microscopic photosynthetic marine alga that forms one of the foundations of the food chain in the ocean
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| Endosymbiosis | symbiosis in which one of the symbiotic organisms lives inside the other
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| Flagella | a long hair-like appendage composed of protein and responsible for motion in microscopic organisms
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| Foraminiferan | a shell-containing amoeboid protozoan having a chalky skeleton with window-like openings between sections of the shell
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| Fruiting body | the general name for a reproductive structure of a fungus from which spores are produced
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| Green algae | a member of the Protists that carries out photosynthesis ans may have given rise to green plants
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| Intermediate host | a host in which the larval or asexual stage of a parasite is found
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| Macronucleus | the larger of two nuclei in most ciliates
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| Micronucleus | the smaller of two nuclei in most ciliates
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| Mixotroph | an organism that can exist as either an autotroph or a heterotroph
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| Organelle | a specialized compartment in eukaryotic cells that has a particular function
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| Pellicle | a flexible covering layer typical of the protozoan ciliates
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| Phytoplankton | microscopic free-floating communities of cyanobacteria and unicellular algae
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| Plasmodium | the acellular mass of protoplasm consisting of thousands of nuclei typical of the acellular slime mold
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| Protozoan | a single-celled eukaryotic organism that lacks a cell wall and usually exhibits chemoheterotrophic metabolism
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| Pseudopodium | a projection of the plasma membrane that allows movement in the members of the amoebozoans
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| Radiolarian | a single-celled marine organism with a round silica-containg shell that has radiating arms to catch prey
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| Red tide | a brownish-red discoloration in seawater caused by increased numbers of dinoflagellates
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| Slime mold | an amoeboid protest that can, under certain conditions, transform into a multicellular slug and migrate to better growth conditions
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| Symbiosis | an interrelationship between two populations of organisms where there is a close and permanent association
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| Trichocyst | a structure of some ciliate and flagellate protozoans that consists of a cavity that contains long, thin threads that are ejected in response to the correct stimuli
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| Trophozoite | the feeding form of a microorganism, such as a protozoan
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| Unicellular alga | a member of the protists that exists as a single cell and carries out photosynthesis
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| Water mold | a member of the protists that superficially resembles a fungal mold but is now recognized as having an independent evolutionary history
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| Zooplankton | small crustaceans and other animals that inhabit the water column of oceans, seas, and bodies of fresh water
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| Zoospore | an asexual spore that uses a flagellum for locomotion
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