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Protists

Explore the fascinating world of protists, ranging from simple one-celled organisms to complex eukaryotes. Discover the various characteristics, mobility, and diversity of animal-like, plant-like, parasitic, and beneficial protists. Learn about their essential roles in the environment and how they contribute to global oxygen production. Any questions?

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Protists

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  1. Domain Archaebacteria Domain Eukaryotes Domain Bacteria Common ancestor Protists Simple Eukaryotes

  2. General characteristics • Classification criteria • eukaryotes • not animal, plant or fungi That’s more ofwhat they’re not& notwhat they are!

  3. Protist Diversity • A great variety in ways of life • one-celled to many-celled • autotrophs (photosynthesis) to heterotrophs (have to eat) • asexual to sexual reproduction • pathogens to beneficial • sessile to mobile

  4. Mobility • How Protists move • flagellum • cilia • pseudopod

  5. Paramecium with food vacuoles stained red Amoeba ingesting a Paramecium Protist Diversity • Animal-like Protists • heterotrophs, predators • Amoeba • Paramecium • Stentor

  6. Protist Diversity • Plant-like Protists • autotrophs, photosynthesis • Euglena • algae • diatoms

  7. Protist Diversity • Parasitic & pathogen Protists • malaria • Giardia • trypanosomes Plasmodium Giardia Trypanosoma

  8. Protist Diversity • Beneficial & necessary Protists • phytoplankton • small algae + diatoms • much of the world’s photosynthesis • produces ~90% of atmospheric oxygen • zooplankton • heterotroph protists • key ecological role at base of marine food web Mmmmmm!Keeps me goin’!

  9. Any Questions??

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