Protists Notes Updated

Caudatum a freshwater ciliate brown algae rhizarians

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Unformatted text preview: isms that includes a recent common ancestor and all its decedents • Paraphyle)c • A group of organisms that includes a common ancestor and some, not all, of its decedents Excavates Two nuclei •  Deep “excavated” oral groove •  Unicellular •  Flagella •  Many have modified mitochondria •  Many live in anaerobic environment •  Representa)ve clades –  Diplomonads and parabasalids –  Euglenoids and trypanosomes Hundreds of flagella 6 2/4/14 Excavates Euglena gracilis Trypanosoma brucei Chromalveolates •  Few shared characteris)cs •  •  Many photosynthe)c Thought to be products of secondary endosymbiosis Representa)ve clades –  •  –  DNA sequence analysis suggest that not all are from a shared ancestor Alveolates •  Alveoli •  Consist of –  –  –  –  –  Flaeened vesicles containing cellulose located just inside the plasma membrane Dinoflagellates Apicomplexans Ciliates Stramenopiles •  •  Many are mo)le cells with two flagella, one of which has )ny hair like projec)ons Consist of –  –  –  –  Water molds Diatoms Golden algae Brown algae Dinoflagellates Plasmodium, an apicomplexan and causa)ve agent of malaria 7...
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This document was uploaded on 03/19/2014 for the course BIO 1312 at Dallas.

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