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Protists

Protists. 7 th Grade Science. What are they??. Protists are all the “leftovers” Eukaryotes (their cells have a nucleus) Live in moist environments Diverse group – classified three ways Animal-like protists (ameba, paramecium) Fungus-like protists (water molds, downy mildews, slime molds)

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Protists

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  1. Protists 7th Grade Science

  2. What are they?? • Protists are all the “leftovers” • Eukaryotes (their cells have a nucleus) • Live in moist environments • Diverse group – classified three ways • Animal-like protists (ameba, paramecium) • Fungus-like protists (water molds, downy mildews, slime molds) • Plantlike protists (algae)

  3. Protist vocabulary • Protozoans = animal-like protists • Move from one place to another to obtain food • Unicellular, heterotrophic • Pseudopod = “false foot”, bulge in cell membrane full of cytoplasm, used to move protists/trap food • Contractile vacuole = structure that collects extra water and expels it from the cell • Cilia = structures on ciliates, hair-like projections that help protists move, obtain food, and sense movement • Flagella

  4. algae • Plantlike protists = algae • Algae can live on bark of trees, fresh or salt water • Algae on the surface of ponds, lakes, or oceans are a food source for other water organisms • Most oxygen in Earth’s atmosphere made by algae • Types of algae • Euglenoids, dinoflagellates, diatoms, green algae, red algae, and brown algae

  5. In pairs… • Look up one of the following protists • Giardia, sarcodines, amoebas, sporozoa, ciliates, paramecium, slime molds, euglenoids, dinoflagellates, diatoms, green algae, red algae, and brown algae • Find out the following pieces of information • Is your protist animal-like, plantlike, or fungus-like? • What does your protist eat? • How does your protist move (if it moves)? • Put the following on a piece of construction paper • Drawing of your protist • Name of your protist • Answers to the three questions above • Any other fun or interesting facts you found

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