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| An informal term applied to any eukaryote that is not a plant, animal or fungus.Most Protists are unicellular, though some are colonial or multicellular. |
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| An organism that is capable of both photosynthesis and heterotrophy. |
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| A process in eukaryotic evolution in which a heterotrophic eukaryotic cell engulfed a photosynthetic eukaryotic cell, which survived in a symbiotic relationship inside a heterotrophic cell. |
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| One of five supergroups of eukaryotes proposed in a current hypothesis of the evolutionary history of eukaryotes.Excavates have unique cytoskeletal features, and some species have an "excavated" feeding groove on one side of the cell body. |
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| A protist that has modified mitochondria, two equal-sized nuclei, and multiple flagella. |
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| A protist, such as a trichomonad, with modified mitochondria. |
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| Member of a diverse clade of flagellated protists that includes predatory heterorophs, photosynthetic autotrophs, and pathogenic parasites. |
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| A protist, such as a trypanosome, that has a single large mitochondrion that houses an organized mass of DNA. |
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| A protist, such as Euglena or its relatives, characterized by an anterior pocket from which one or two flagella emerge. |
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| One of five supergroups of eukaryotes proposed in a current hypothesis of the evolutionary history of eukaryotes.chromalveolates may have originated by secondary endosymbiosis and include two large protist clades, the alveolates and the stramenopiles. |
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| A protist with membrane-bounded sacs (alveoli) located just under the plasma membrane. |
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| Member of a group of mostly unicellular photosynthetic algae with two flagella situated in perpendicular grooves in cellulose plates covering the cell. |
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| A protist in a clade that includes many species that parasitize animals.Some apicomplexans cause human disease. |
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| A type of protist that moves by means of cilia. |
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| A protist in which a "hairy" flagellum (one covered with fine, hairlike projections) is paired with a shorter, smooth flagellum. |
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| A unicellular photsynthetic alga with a unique glassy cell wall containing silica. |
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| A biflagellated, photosynthetic protist named for its color, which results from its yellow and brown carotenoids. |
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| A multicellular, photosynthetic protist with a characteristic brown or olive color that results from carotenoids in its plastids.Most brown algae are marine, and some have a plantlike body (thallus). |
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| A seaweed body that is plantlike, consisting of a holdfast, stipe, and blades, yet lacks true roots, stems, and leaves. |
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| A rootlike structure that anchors a seaweed. |
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| A stemlike structure of a seaweed. |
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| A leaflike structure of a seaweed that provides most of the surface area for photosynthesis. |
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| Alternation of Generations |
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| A life cycle in which there is both a multicellular diploid form, the sporophyte and a multicellar haploid form, the gametophyte; characteristic of plants and some algae. |
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| Referring to a condition in the life cycle of plants and certain algae in which the sporophyte and gametophyte generations differ in morphology. |
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| Referring to alternating generations in plants and certain algae in which the sporophytes and gametophytes look alike, although they differ in chromosome number. |
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| A protist with flagellated cells, such as a water mold, white rust, or downy mildew, that acquires nutrition mainly as a decomposer of plant parasite. |
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| One of five supergroups of eukaryotes proposed in a current hypothesis of the evolutionary history of eukaryotes; a morpholoigically diverse protist clade that is defined by DNA similarities. |
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| A protist grade characterized by the presence of pseudopodia. |
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| A cellular extension of amoeboid cells used in moving and feeding. |
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| An acquatic protist that secretes a hardened shell containing calcium carbonate and extends pseudopodia through pores in the shell. |
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| A protist, usually marine, with a shell generally made of silica and pseudopodia that radiate from the central body. |
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| One of five supergroups of eukaryotes proposed in a current hypothesis of the evolutionary history of eukaryotes.This monophyletic group, which includes red algae, green algae and land plants, descended from a ancient protist ancestor that engulfed a cyanobacterium. |
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| A photosynthetic protist, named for green chloroplasts that are similar in structure and pigment composition to those of land plants.Green algae are a paraphyletic group, some of whose members are more closely related to land plants than they are to other green algae. |
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| One of five supergroups of eukaryotes proposed in a current hypothesis of the evolutionary history of eukaryotes.This clade, which is supported by studies of myosin proteins and DNA, consists of amoebozonas and opisthokonts. |
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| A protist in a clade that includes many species with lobe or tube shaped pseudopodia. |
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| A type of protist that has amoeboid cells, flagellated cells, and a plasmodial feeding stage in its life cycle. |
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| A single mass of cytoplasm containing many diploid nuclei that forms during the life cycle of some slime molds. |
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| A type of protist that has unicellular amoebioid cells and aggregated reproductive bodies in its life cycle. |
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| Member of the diverse clade Opisthokonta, organisms that descended from an ancestor with a posterior flagellum, including fungi, animals and certain protists. |
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| An organism that produces organic compounds from CO2 by harnessing light energy (in photosynthesis) or by oxidizing inorganic chemicals (in chemosynthetic reactions carried out by some prokaryotes). |
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