domain eukarya – kingdom protistadomain eukarya – kingdom protista • single celled organism...
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DomainEukarya – KingdomProtista
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DomainEukarya – KingdomProtista
• Singlecelledorganism• Over200,000organisms• Theyarestilleukaryotes(membraneboundorganelleswithnucleus)
• 3separategroups– Protozoans(likeanimals)– Plantlike(Algae)– Funguslike (moldsetc)
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3Protists groupcomparisonAnimallikeprotozoans• Needsto‘hunt’
forfood(heterotrophs)
• 4groups– Ciliophora– Sarcodina– Apicomplexa– Zoomastigina
Plantlikeprotists - algae
• Feedondecomposingmatterforfood(heterotrophs)
• Groups– Slimemolds– Watermolds– DownyMildew
Funguslike protists• Makestheir
ownfood(autotrophs)
• Groups– Diatoms– Dinoflagellates– Euglenoids– Brown,green
andredalgae
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Protozoans- Animal-likeProtists• Ciliophora containsciliaformovement
• Ciliaareshorthairlikeprojectsforlocomotion
• Ex.Paramecium
http://www.youtube.com/watch?v=QGAm6hMysTACiliavs Flagella
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• Sarcodina:– Usespseudopodsforfeedingandlocomotion
– Pseudopodsareextensionsofthecytoplasmthatcanengulfsmallerorganisms.
– Ex.Amoeba
http://www.youtube.com/watch?v=W6rnhiMxtKUFeedingamoeba
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• Apicomplexa:– Produces‘spores’– Lacksvacuolesandmethodsforlocomotion(comparedtociliophora orsarcodina)
– Areparasiticandrequiresahosttosurvive
– Ex.Thesporozoan causesmalaria
http://www.youtube.com/watch?v=5tQc2_QRB10WhatisMalariaprotozoa?
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• Zoomastigina:(Zoh ohMasttuh JInah)– Containsflagellaformovement(longwhiplikestructure)
– Canbeparasiticorfreeliving– Ex.CancauseAfricanSleepingsicknesscarriedbytsetsefly
– Mentaldeterioration–sleeplessatnight
http://www.youtube.com/watch?v=4aVUrGO97ZgAnimalPlanetonTseTse fly
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Plantlikeprotists - Algae
• Performsphotosynthesis• Differfromplantsbecausetheydon’thaveroots,leavesorotherplantstructures
• Groups– Diatoms– Dinoflagellates– Euglenoids– Brown,greenandredalgae
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• Diatoms– Unicellular– Uniquestructure– Storefoodasoilinsteadofcarbohydrates
– http://www.youtube.com/watch?v=0z-zBy3UQQE
– Diatoms
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• Dinoflagellates– MostareUnicellular– Containstwoflagellaatrightanglestoeachother.
– Maincauseforalgalbloomsinoceansandlakescalled“redtides”
– Canbebothheterotrophsandautogrophs.
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Redtidesaretoxicbecauseanervetoxinisproducedharmingshellfishandtheirprey(humanswhoingestthem)
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• Euglenoids– Unicellular– Difficulttoclassifyastheycontaincharacteristicsofbothanimalsandplants
– Performsphotosynthesisandabsorbnutrients
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• Brown,greenandredalgae– Differentcoloralgaecontaindifferentpigmentsinchlorophyll
– Algaecanbeusedinfoodsuchassushi,soupsandcondiments.
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Lastly,thefunguslike protists
• Slimemolds• Consumesdecomposingmatterfornutrients• Producesspores• Funguslike protists donotcontainchitin(rememberfrommacromolecules?)whilerealfungusdo
• Chitinmakesupthecellwallandformsthestructureoffungus
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• Watermoldsandmildewlivesinwaterordampplaces
• Caninfectpotatoplantsanddestroysthepotato
• 1millionpeoplediedofstarvationin19thcenturybecauseofmold.