20 1 The Kingdom Protista Slide 1 of

20 -1 The Kingdom Protista Slide 1 of 13 Copyright Pearson Prentice Hall End Show

20 -1 The Kingdom Protista What Is a Protist? Protists are eukaryotes that are not members of the Plant, Animal, or Fungi kingdoms. Slide 2 of 13 Copyright Pearson Prentice Hall End Show

20 -1 The Kingdom Protista What Is a Protist? The kingdom Protista may include more than 200, 000 species. Most, but not all, protists are unicellular. Most, but not all, live in water ecosystems. Slide 3 of 13 Copyright Pearson Prentice Hall End Show

20 -1 The Kingdom Protista Evolution of Protists How did Protists Evolve? The first eukaryotic organisms on Earth were protists. Mitochondria and chloroplasts in eukaryotic cells may have descended from prokaryotes that lived inside larger cells. (This is called the endosymbiotic theory. ) Evidence to support this theory includes the fact that mitochondria and chloroplasts have their own DNA. Dr. Lynn Margulis 1938 - 2011 Copyright Pearson Prentice Hall Slide 4 of 13 End Show

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20 -1 The Kingdom Protista Classification of Protists How are Protists Classified? One way protists can be classified is by how they obtain nutrition. There are 3 categories: Slide 6 of 13 Copyright Pearson Prentice Hall End Show

20 -1 The Kingdom Protista 1) Heterotrophs are called animal-like protists. Examples: paramecium, amoeba, zooflagellates Slide 7 of 13 Copyright Pearson Prentice Hall End Show

20 -1 The Kingdom Protista 2) Photosynthesizers are called plant-like protists. Examples: euglena, diatoms, algae Unicellular euglena Multicellular algae Copyright Pearson Prentice Hall Slide 8 of 13 End Show

20 -1 The Kingdom Protista 3) Decomposers and parasites are called fungus-like protists. Examples: slime molds, water molds Slide 9 of 13 Copyright Pearson Prentice Hall End Show