protists & their characteristics
DESCRIPTION
A powerpoint presentation of the Kingdom Protista and some of their members and typical characteristics.TRANSCRIPT
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ProtistsProtists
The world of Protists:The world of Protists:Animal-like ProtistsAnimal-like ProtistsPlant-like ProtistsPlant-like Protists
Fungus-like ProtistsFungus-like Protists
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Protist DiversityProtist Diversity200,000 species come in 200,000 species come in
different shapes, sizes, and different shapes, sizes, and colorscolors
All are All are eukaryoteseukaryotes – have a – have a nucleus and membrane-nucleus and membrane-bound organellesbound organelles
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ProtozoansProtozoans
Animal-like ProtistsAnimal-like Protists
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ProtozoansProtozoansUnicellularUnicellular – made up of one – made up of one
cellcellHeterotrophsHeterotrophs – they eat – they eat
other organisms or dead other organisms or dead organic matterorganic matter
Classified by how they moveClassified by how they move
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PhylaPhyla of Protozoans of ProtozoansAmoebasAmoebas
FlagellatesFlagellates
CiliatesCiliates
SporazoansSporazoans
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AmoebasAmoebas: the blobs: the blobs
No cell wallNo cell wallMove using Move using pseudopodspseudopods – –
plasma extensionsplasma extensionsEngulf bits of food by Engulf bits of food by
flowing around and over flowing around and over themthem
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FlagellatesFlagellates: the : the motorboatsmotorboats
Use a whip-like extension Use a whip-like extension called a called a flagellaflagella to move to move
Some cause diseasesSome cause diseases
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Trichomonas foetusTrichomonas foetus : cow disease : cow disease
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Trichomonas vaginalis: an STDTrichomonas vaginalis: an STD
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CiliatesCiliates: the hairy ones: the hairy onesMove beating tiny hairs Move beating tiny hairs
called called ciliacilia
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SporazoansSporazoans: the : the parasiteparasite
Non-motileNon-motile - Do not move - Do not moveLive inside a Live inside a hosthostOne type causes One type causes malariamalaria
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Malaria in red blood cellsMalaria in red blood cells
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Pneumonia in aids patientsPneumonia in aids patients
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AlgaeAlgae
Plantlike ProtistsPlantlike Protists
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What are Algae?What are Algae?MulticellularMulticellular – made of more – made of more
than one cellthan one cellPhotosyntheticPhotosynthetic – make their – make their
own foodown foodNo roots, stems, or leavesNo roots, stems, or leavesEach has Each has chlorophyllchlorophyll and other and other
photosynthetic pigmentsphotosynthetic pigments
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PhylaPhyla of Algae of AlgaeEuglenoidsEuglenoids
DiatomsDiatomsDinoflagellatesDinoflagellates
Red, Brown, & Green AlgaeRed, Brown, & Green Algae
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EuglenoidsEuglenoids: The : The SurvivorsSurvivors
AquaticAquaticMove around like animalsMove around like animalsCan ingest food from Can ingest food from
surroundings when light is surroundings when light is not availablenot available
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DiatomsDiatoms: The Golden : The Golden OnesOnes
Have shells made of silica Have shells made of silica (glass)(glass)
Photosynthetic pigment Photosynthetic pigment called called carotenoidscarotenoids – give – give them a golden colorthem a golden color
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DinoflagellatesDinoflagellates: The : The Spinning OnesSpinning Ones
Spin around using two flagellaSpin around using two flagellaResponsible for Red TidesResponsible for Red TidesCreate toxins that can kill Create toxins that can kill
animals and sometimes animals and sometimes peoplepeople
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Red AlgaeRed Algae: : The…uh…Red Ones The…uh…Red Ones
(duh)(duh)SeaweedsSeaweedsMulticellular, marine Multicellular, marine
organismsorganismsHave red and blue Have red and blue
pigmentspigments
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Brown AlgaeBrown Algae: : The Brown Ones The Brown Ones
(You think?)(You think?)
They have They have air bladdersair bladders to to help them float at the surface help them float at the surface – where the light is.– where the light is.
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Green AlgaeGreen Algae: : Yeah, You Guessed it, Yeah, You Guessed it,
The Green OnesThe Green OnesMost live in Most live in fresh waterfresh waterCan be unicellular or Can be unicellular or
multicellularmulticellularLive alone or in groups Live alone or in groups
called called coloniescolonies
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Fungus-like ProtistsFungus-like Protists
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Characteristics in Characteristics in CommonCommon
All form delicate, netlike All form delicate, netlike structures on the surface structures on the surface of their food sourceof their food source
Obtain energy by Obtain energy by decomposing organic decomposing organic materialmaterial
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PhylaPhylaofof
Fungus-like ProtistsFungus-like ProtistsPlasmodium Slime MoldsPlasmodium Slime Molds
Cellular Slime MoldsCellular Slime Molds
Water Molds & Downy Water Molds & Downy MildewsMildews
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Slime MoldsSlime Molds
Live in cool moist, shady Live in cool moist, shady places where they grow on places where they grow on damp, organic matterdamp, organic matter
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Plasmodium Slime Plasmodium Slime MoldsMolds
Form Form plasmodiumplasmodium: a mass : a mass of cytoplasm that contains of cytoplasm that contains many diploid nuclei but no many diploid nuclei but no cell walls or membranes – cell walls or membranes – its feeding stageits feeding stage
Creeps by amoeboid Creeps by amoeboid movement – 2.5 cm/hourmovement – 2.5 cm/hour
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Plasmodium Plasmodium continued…continued…
May reach more than a meter May reach more than a meter in diameterin diameter
Form reproductive structures Form reproductive structures when surroundings dry upwhen surroundings dry up
SporesSpores are dispersed by the are dispersed by the wind and grow into new wind and grow into new plasmodiumplasmodium
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Cellular Slime MoldsCellular Slime MoldsIn feeding mode, they exist In feeding mode, they exist
as individual amoebic cellsas individual amoebic cellsWhen food becomes When food becomes
scarce, they come together scarce, they come together with thousands of their own with thousands of their own kind to reproducekind to reproduce
May look like a plasmodiumMay look like a plasmodium
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Water Molds and Water Molds and Downy MildewsDowny Mildews
Live in water or moist Live in water or moist placesplaces
Feed on dead organisms Feed on dead organisms or parasitize plantsor parasitize plants
Fuzzy white growthsFuzzy white growths
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That’s AllThat’s All