DomainEukarya – KingdomProtista

DomainEukarya – KingdomProtista

• Singlecelledorganism• Over200,000organisms• Theyarestilleukaryotes(membraneboundorganelleswithnucleus)

• 3separategroups– Protozoans(likeanimals)– Plantlike(Algae)– Funguslike (moldsetc)

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

Protozoans- Animal-likeProtists• Ciliophora containsciliaformovement

• Ciliaareshorthairlikeprojectsforlocomotion

• Ex.Paramecium

http://www.youtube.com/watch?v=QGAm6hMysTACiliavs Flagella

• Sarcodina:– Usespseudopodsforfeedingandlocomotion

– Pseudopodsareextensionsofthecytoplasmthatcanengulfsmallerorganisms.

– Ex.Amoeba

http://www.youtube.com/watch?v=W6rnhiMxtKUFeedingamoeba

• Apicomplexa:– Produces‘spores’– Lacksvacuolesandmethodsforlocomotion(comparedtociliophora orsarcodina)

– Areparasiticandrequiresahosttosurvive

– Ex.Thesporozoan causesmalaria

http://www.youtube.com/watch?v=5tQc2_QRB10WhatisMalariaprotozoa?

• Zoomastigina:(Zoh ohMasttuh JInah)– Containsflagellaformovement(longwhiplikestructure)

– Canbeparasiticorfreeliving– Ex.CancauseAfricanSleepingsicknesscarriedbytsetsefly

– Mentaldeterioration–sleeplessatnight

http://www.youtube.com/watch?v=4aVUrGO97ZgAnimalPlanetonTseTse fly

Plantlikeprotists - Algae

• Performsphotosynthesis• Differfromplantsbecausetheydon’thaveroots,leavesorotherplantstructures

• Groups– Diatoms– Dinoflagellates– Euglenoids– Brown,greenandredalgae

• Diatoms– Unicellular– Uniquestructure– Storefoodasoilinsteadofcarbohydrates

– http://www.youtube.com/watch?v=0z-zBy3UQQE

– Diatoms

• Dinoflagellates– MostareUnicellular– Containstwoflagellaatrightanglestoeachother.

– Maincauseforalgalbloomsinoceansandlakescalled“redtides”

– Canbebothheterotrophsandautogrophs.

Redtidesaretoxicbecauseanervetoxinisproducedharmingshellfishandtheirprey(humanswhoingestthem)

• Euglenoids– Unicellular– Difficulttoclassifyastheycontaincharacteristicsofbothanimalsandplants

– Performsphotosynthesisandabsorbnutrients

• Brown,greenandredalgae– Differentcoloralgaecontaindifferentpigmentsinchlorophyll

– Algaecanbeusedinfoodsuchassushi,soupsandcondiments.

Lastly,thefunguslike protists

• Slimemolds• Consumesdecomposingmatterfornutrients• Producesspores• Funguslike protists donotcontainchitin(rememberfrommacromolecules?)whilerealfungusdo

• Chitinmakesupthecellwallandformsthestructureoffungus

• Watermoldsandmildewlivesinwaterordampplaces

• Caninfectpotatoplantsanddestroysthepotato

• 1millionpeoplediedofstarvationin19thcenturybecauseofmold.