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The Protists

Chapter 7: The Protists

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