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Kingdom Protista. Protists. Can be divided into plant-like, animal-like, and fungus-like groups Important members of the phytoplankton and zooplankton We will concentrate on plant-like and animal-like. Plant-like Protists. Algae Aquatic (freshwater or marine) - PowerPoint PPT Presentation
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Kingdom Protista
ProtistsCan be divided into plant-like, animal-like, and fungus-like groupsImportant members of the phytoplankton and zooplanktonWe will concentrate on plant-like and animal-like
Plant-like ProtistsAlgaeAquatic (freshwater or marine)Found anywhere you find tiny drops of waterPhotosyntheticCell walls containing celluloseCan be green, red or brownColor reflects concentration of pigments in chloroplastsDiatomsDinoflagellates
Green AlgaePhylum ChlorophytaMajority live in freshwaterReproduce asexually and sexuallyMost unicellularEx: Sea Lettuce (Ulva) Marine algaeResembles a large leaf of lettuceReproduces sexually
Red AlgaePhylum RhodophytaPrimarily marine, found in warm oceansRed pigment masks green color of chlorophyllCan grow on rocks and other algae & plantsSome can be parasiticImportant uses:Agar-used for culture media for growing bacteriaIrish moss-used to make a type of puddingPorphyra-used to make sushi, soups, seasonings
Brown AlgaePhylum PhaeophytaMarine, found in cooler water & along shoresYellow pigment masks green chlorophyllCan be microscopic to 100 meters in sizeReproduce sexuallyEx: rockweed, kelpImportant uses:Algin-used in cosmetics & food industryIodine- concentrated in kelp tissues, harvested for table salt
DiatomsPhylum BacillariophytaUnicellularMicroscopicFreshwater & marineMainly reproduce asexually, reproduce sexually when reach a certain sizeProvide much of the worlds oxygenYellow pigments that mask chlorophyll
Cell walls formed by double shell, 2 halves (frustules) fit together like boxShell made of silica (glass-like material)Cant be decomposed and recycled by bacteriaShells accumulate on bottom of sea, may form sedimentary rocks & deposits called diatomaceous earthDeposits mined & used for swimming pool filters, silver polish, toothpaste
DinoflagellatesPhylum PyrrophytaUnicellularArmored in stiff cellulose walls2 flagella used in locomotionContain chlorophyllReproduce asexuallySome produce powerful toxins, are parasites, or symbionts
Animal-Like ProtistsKnown as ProtozoaMostly heterotrophicAbundant in damp soil, fresh, and marine waterInclude: Amoeba, Foraminiferans, Paramecium, Radiolarians
AmoebasUnicellularFound in mud & sandy bottoms of marine habitatsMove by pseudopodia- false foot, push forward in finger-like projections of cytoplasmUse to surround & engulf preyReproduce by binary fission
ForaminiferansShelled amoebasShell made of calcium chloride, has many chambersMany small openings through which pseudopodia projectMarineReproduce sexually & asexuallyShells of dead foraminiferans make up special sedimentsSome is brought to surface & forms chalk depositsEx: White Cliffs of Dover, English Channel
RadiolariansShells made of silicaSmall openings w/ pseudopodia projecting outwardReproduce sexuallyMarineLive throughout the different zones of the oceans
ParameciumPhylum CiliophoraUnicellularMarine & freshwaterDistinct anterior & posterior endsMove by ciliaShort, whip-like extensions that beat in rhythm