Protists

ProtistsGroups of Protists:Animal-like ProtistsPlant-like ProtistsFungus-like Protists1Protist Diversity200,000 species come in different shapes, sizes, and colorsAll are eukaryotes have a nucleus and membrane-bound organelles2ProtozoansAnimal-like Protists3ProtozoansUnicellular made up of one cellHeterotrophs they eat other organisms or dead organic matterClassified by how they move4Groups (Phyla) of ProtozoansAmoebasFlagellatesCiliatesSporazoans5Amoebas: the blobsNo cell wallMove using pseudopods plasma extensionsEngulf bits of food by flowing around and over them6

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8Flagellates: the motorboatsUse a whip-like extension called a flagella to moveSome cause diseases9

Trichomonas foetus : cow disease

11Ciliates: the hairy onesMove beating tiny hairs called cilia12

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15Sporazoans: the parasiteNon-motile - Do not moveLive inside a hostOne type causes malaria

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Malaria in red blood cells18AlgaePlantlike Protists19What are Algae?Multicellular made of more than one cellPhotosynthetic make their own foodNo roots, stems, or leavesEach has chlorophyll and other photosynthetic pigments20Phyla of AlgaeEuglenoidsDiatomsDinoflagellatesRed, Brown, & Green Algae21Euglenoids: The In-BetweensAquaticMove around like animalsCan ingest food from surroundings when light is not available22

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24Diatoms: The Golden OnesHave shells made of silica (glass)Photosynthetic pigment called carotenoids give them a golden color25

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27Dinoflagellates: The Spinning OnesSpin around using two flagellaResponsible for Red TidesCreate toxins that can kill animals and sometimes people28

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31Red Algae: TheuhRed OnesSeaweedsMulticellular, marine organismsHave red and blue pigments32

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34Brown Algae: The Brown Ones (really?)They have air bladders to help them float at the surface where the light is.35

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37Green Algae: You Guessed it,The Green OnesMost live in fresh waterCan be unicellular or multicellularLive alone or in groups called colonies38

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40Fungus-like Protists41Characteristics in CommonAll form delicate, netlike structures on the surface of the food sourceObtain energy by decomposing organic material42

43PhylaofFungus-like ProtistsPlasmodium Slime MoldsCellular Slime MoldsWater Molds & Downy Mildews44Slime MoldsLive in cool moist, shady places where they grow on damp, organic matter45Plasmodium Slime MoldsForm plasmodium: a mass of cytoplasm that contains many diploid nuclei but no cell walls or membranes its feeding stageCreeps by amoeboid movement 2.5 cm/hour46Plasmodium continuedMay reach more than a meter in diameterForm reproductive structures when surroundings dry upSpores are dispersed by the wind and grow into new plasmodium47

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49Cellular Slime MoldsIn feeding mode, they exist as individual amoebic cellsWhen food becomes scarce, they come together with thousands of their own kind to reproduceMay look like a plasmodium50

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53Water Molds and Downy MildewsLive in water or moist placesFeed on dead organisms or parasitize plantsFuzzy white growths54

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