2PROTISTS We have already learned about Bacteria and Viruses Now it’s time to study ProtistsMICROBES:VirusesBacteriaProtists?
3PROTISTS Protists can be very different from each other. All protists are EUKARYOTES = DNA is found in a nucleusSome are like animals, some are like plants, some are like fungi, but they are a little different. So they are Protists.All live in moist environmentsSome are UNICELLULAR, while others are MULTICELLULAR
4PROTISTS Some are HETEROTROPHS Some are AUTOTROPHS Some are BOTH What are heterotrophs? Autotrophs?Imagine being both….
5PROTISTS 3 CATEGORIES OF PROTISTS: Animal-like Protists Plant-like ProtistsFungus-like Protists
6Animal-like PROTISTS ALSO CALLED PROTOZOANS All animal-like protists are HETEROTROPHSMost are able to move from place to place to get their food.4 GROUPS OF PROTOZOANS:Protozoans with PSEUDOPODSProtozoans with CILIAProtozoans with FLAGELLAProtozoans that are PARASITES
7Protozoans With Pseudopods Sarcodines have PSEUDOPODS = means “false foot”. Part of the cytoplasm bulges towards one location, and the rest of the organism follows.Sarcodines include: AmoebasAmoebas also have CONTRACTILE VACUOLES = a structure that collects extra water then squirts it out from the cell.
9Protozoans With CiliaCiliates have CILIA = hair-like projections from cells that move with a wavelike motion.Ciliates include: ParameciumParamecium have 2 Nuclei, 2 contractile vacuoles, and can reproduce asexually and sexually.
11Protozoans with Flagella Flagellates have flagellaSome of these live inside other organisms.SYMBIOSIS = a close relationship in which at least one of the species is helped.MUTUALISM = a close relationship in which both species are helped.
12Protozoans that are Parasites Some protozoans feed on the cells of their host and cause harm.
13Plant-like PROTISTS Commonly called ALGAE (that green stuff on a pond) All are AUTOTROPHSTHE DIFFERENT GROUPS OF ALGAE:DiatomsDinoflagellatesEuglenoidsRed AlgaeGreen AlgaeBrown Algae
15Fungus-like Protists All are HETEROTROPHS All have Cell Walls All use SPORES to reproduceAll can move at some point in their livesTHE 3 KINDS OF FUNGUS-LIKE PROTISTS:Slime moldsWater moldsDowny molds
17Living orNon-LivingLivingStructureDepends on typeThey can look like animal or plant cellsDifferent Typesof ProtistsProtozoans (Animal-like Protists)Algae (Plant-like Protists)Fungus-like ProtistsHow theyReproduceSexually & AsexuallySize of ProtistsVary from unicellular to multi-cellularSome are microscopic while others you can see with your eyes alone.
18Good things Protists do Symbiosis and mutualism with other organisms.Algae are main source of oxygen in atmosphere.Provide food for other organismsHousehold products (diatoms)