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Chapter 8 Kingdom Protista
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Protist – a single or many celled organism that lies in moist or wet surroundings Eukaryotic Plant like Animal like Fungus like Some contain chlorophyll Some do not have chlorophyll
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Evolution of Protists Evolved from bacteria b/c they are more advanced than bacteria Cyanobacteria evolved into plantlike protists Protists are the ancestors of fungus, plants and animals
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Plantlike Protists Also known as algae Autotrophs Desmid Spirogyra,
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Pediastrum, a flat colony of green algae
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green algae is Volvox. a spherical colony. All the small cells of the colony possess two flagella and a small eyespot. colony is able to swim towards the light.
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Fucus - algae Brown seaweed
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algae Red seaweed
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Ulva – sea lettuce
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Euglena
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Single celled Characteristics of both plants and animals Plant – chlorophyll Animal – locomotion - flagella - no sun becomes heterotroph Eyespot – senses light
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Diatoms -unicellular -shell made of silica or glass w/ two parts that fit together snuggly -golden brown pigment that masks chlorophyll -when die sink to bottom of ocean Used in toothpaste and road lines
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Dinoflagellates - Armor made of cellulose - Spinning flagellates - One flagella moves the cell - One flagella circle the cell to spin it - Unicellular - Store food in form of starch and oils - Live in salt water - Food for saltwater organisms - Red tide – over population of dino. produce toxins in water and kill organisms
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Animal like protists - protozoa One-celled Habitat: water, soil living and dead organisms
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Amoeba Pseudopods – “false feet” – Used for locomotion Cytoplasmic streaming – Used for feeding – Pseudopod forms around the food. This forms a vacuole.
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Amoeba with food vacuoles
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flagellates Protozoa that use flagellum Ex. Trypanosoma – – Responsible for African Sleeping Sickness
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ciliates
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Ciliates – Paramecium Slipper shaped Cilia – short hairs from cell membrane - used in locomotion - food getting Pellicle – outer skin Macronucleus – controls everyday activities Micronucleus – used in reproduction
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Oral groove – cilia sweep bacteria into this mouth Food vacuole forms Anal pore – waste vacuole removed Contractile vacuole – controls water in cell Trichocysts – anchor animal - capture food
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Paramecium
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Sexual reproduction of paramecium conjugation Overcrowding or environmental stress 2 paramecium line up side to side and exchange genetic material Micronucleus is exchanged Go on to binary fission
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Fungus like protists Live in moist soil and on decaying plants and trees Very colorful Move by forming pseudopods pseudopods Feed on bacteria and other microorganismsbacteriamicroorganisms Reproduce by spores
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Pretzel slime mold
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Yellow slime mold
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Dog vomit slime mold
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Slime mold on grass
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Water Molds Fuzzy white growths on decaying matter Grow as a mass of threads over a plant or animal and digest it Reproductive cells with flagella Have cell walls
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Water mold
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