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PROTISTS. YOU MUST KNOW… SOME DON’T CLASSIFY PROTISTS AS A KINGDOM HOW CHLOROPLASTS AND MITOCHONDRIA EVOLVED THROUGH ENDOSYMBIOSIS.

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Presentation on theme: "PROTISTS. YOU MUST KNOW… SOME DON’T CLASSIFY PROTISTS AS A KINGDOM HOW CHLOROPLASTS AND MITOCHONDRIA EVOLVED THROUGH ENDOSYMBIOSIS."— Presentation transcript:

1 PROTISTS

2 YOU MUST KNOW… SOME DON’T CLASSIFY PROTISTS AS A KINGDOM HOW CHLOROPLASTS AND MITOCHONDRIA EVOLVED THROUGH ENDOSYMBIOSIS

3 CONCEPT 28.1 MOST EUKARYOTES ARE SINGLE- CELLED ORGANISMS

4 PROTISTS ARE… EUKARYOTES THAT ARE NEITHER PLANTS, ANIMALS, NOR FUNGI PROTISTS ARE PARAPHYLETIC – MANY ARE MORE CLOSELY RELATED TO PLANTS, FUNGI, OR ANIMALS THAN TO OTHER PROTISTS

5 PROTISTS VARY IN STRUCTURE AND FUNCTION MORE THAN ANY OTHER GROUP OF EUKARYOTES COMMONALITIES ARE: 1.MOST ARE UNICELLULAR 2.MOST USE AEROBIC METABOLISM AND HAVE MITOCHONDRIA

6 MITOCHONDRIA AND CHLOROPLASTS EVOLVED THROUGH ENDOSYMBIOSIS THEY WERE ORIGINALLY UNICELLULAR ORGANISMS ENGULFED BY OTHER CELLS THAT ULTIMATELY BECAME ORGANELLES IN THE HOST CELLS

7 3 CATEGORIES PLANT-LIKE PROTISTS – PHOTOSYNTHETIC ANIMAL-LIKE PROTISTS – INGEST FUNGUS-LIKE PROTISTS – ABSORB

8 EXAMPLES GIARDIA EUGLENA DINOFLAGELLATES PLASMODIUM (MALARIA) CILIATES (PARAMECIUM) AMOEBA DIATOMS ALGAE SLIME MOLDS


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