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Kingdom Protista “Protists” Kingdom Protista “Protists” I. Characteristics A.All are eukaryotic B.Most are unicellular /some are multicellular C.Asexual or sexual reproduction D.Autotrophic or heterotrophic E.Can be grouped into 3 general categories by the way they obtain nutrition
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PROTISTS PROTOZOANS (Animal-like) ALGAE (Plant-like) Slime/Water Molds (Fungus-like)
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II. Animal – like Protists: Protozoans A. Heterotrophs-do not make their own food B. Classified by means of movement
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False feet = pseudopods Projections of their cytoplasm (false feet) Most harmless, but some cause dysentery
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1. amoeba-can cause amoebic dysentery 1. amoeba-can cause amoebic dysentery
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2. Lime skeleton formed the white cliffs of Dover
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Move by flagella (whip- like tail) Beneficial example - Trichonympha – live in gut of termites-help termite digest wood
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3. Parasitic a. Trichomonas- causes STD =venereal disease causes STD =venereal disease b. Giardia-freshwater, causes dysentery b. Giardia-freshwater, causes dysentery
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c. Trypanosoma-African sleeping sickness-carried by tsetse fly
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PARAMECIUM move by cilia
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Paramecium
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Sessile 1. Do not move on their own (sessile) 2. All are parasitic-carried by an insect (insect is the vector) 3.Example-Plasmodium – in saliva glands of mosquito, causes Malaria
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MALARIA
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III. Plant-like protists A. Autotrophs-photosynthetic-make their own food B. Classified by: 1.Color 2.Photosynthetic pigments 3.Whether they are unicellular or multicellular
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A. Unicellular Algae
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1. golden algae a. Cell walls of silica b. Example- Diatoms 1.C leaners, toothpaste, filters (diatomaceous earth) 2.M akes up phytoplankton Direct and indirect food source for ocean animals Produce large amount of oxygen (50-70%) Source of offshore oil deposits Autotrophic-bottom of the food chain
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Diatoms
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2. Dinoflagellata a. Phytoplankton b. 2 flagella
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c. Bioluminescent-produce light
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red tide – a bloom that forms toxins bloom = enormous growth bloom = enormous growth 1.Depletes water of nutrients 2.Decomposes dead cells removing oxygen from water 3.Fish and other organisms die
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RED TIDE
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Euglena Used in sewage treatment plants Can cause blooms in pond water
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B. Algae- autotroph-contain chlorophyll and accessory pigments that can give color; Classified by color Classified by color
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Green Algae evolved into 1 st land plants Examples Examples unicellular-Chlamydomonas unicellular-Chlamydomonas
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Volvox-colonial Volvox-colonial
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spirogyra
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Red Algae Used to thicken soup, pudding, frosting. Thickener is carageenan
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Used to make nori (sushi wrap) Used to make nori (sushi wrap)
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3. Brown algae Kelp – largest brown seaweed - used to thicken ice cream
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d. Sargassum – makes up the Sargasso Sea
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IV. Fungus-like protists Slime and Water Molds Decompose matter in soil
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Water molds Caused Great Potato Famine
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KINGDOM FUNGI
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I. Characteristics A. E ukaryotic, Heterotrophic, Cell walls made of chitin B. Decomposers, some are parasitic C. Classified by their fruiting body – how they produce spores
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Fruiting Bodies
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Hyphae basic structural unit
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Bread Mold used in cortisone production Mycelium – mass of tangled hyphae
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Yeasts – used in baking and brewing (unicellular) – fermentation product = CO2 fermentation product = CO2 Remember balloon lab in the fall
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Truffles - edible Morel - edible
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Bracket Fungi Bracket Fungi
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Mushrooms-some are food Mushrooms-some are food
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Rusts/Smuts -- destroy cereal crops Rusts/Smuts -- destroy cereal crops
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Amantia – Deathcap very poisonous
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Puffballs
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Penicillium – makes antibiotic & gives bleu cheese the blue veins
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-makes citric acid and soy sauce -used to produce cyclosporin (anti-rejection drug for transplant patients)
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Responsible for athlete’s foot, ringworm, jock itch, thrush
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VI. Symbiotic Relationship close association of 2 organisms A. Lichen – algae (makes food) + fungus (traps moisture); used to detect air pollution used to detect air pollution B. Mycorrhizae – plant roots (feeds fungus) + fungus (gives water and minerals) fungus (gives water and minerals)
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