zooflagellates and choanoflagellates n.
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Zooflagellates and Choanoflagellates

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  1. Zooflagellates and Choanoflagellates By Maddy Smith

  2. Basic Facts-Zooflagellates • Unicellular (few are colonial) • Spherical or elongated bodies • Central nucleus • Whiplike flagella for movement • Some engulf food using pseudopoda, others have defined mouths

  3. Nutrition • Heterotrophic • Ingest living or dead organisms OR absorb nutrients from dead/decomposing organic matter • Free-living or endosymbionts • Trichonymphs live in guts of termites and cockroaches (mutualism) • Have special enzymes for digesting cellulose (in endosym. Instances)

  4. Relationships • Can be parasitic and pathogenic • Trypanosoma- human parasite which causes African sleeping sickness • Diplomonad: zooflagellate with one or two nuclei, no mitochondria, 1-4 flagella • Giardia intestinalis: common contaminate in mountain streams

  5. Choanoflagellates Phylum: Zoomastigina

  6. Facts • Water-dwellers: marine and freshwater • Free-swimming or sessile (permanently attached by a thin stalk to debris) • Single flagellum surrounded at base by collar of microvilli