01:119:116 Lecture Notes - Lecture 3: African Trypanosomiasis, Giardia Lamblia, Excavata
4 Apr 2016
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Document Summary
Four supergroups: excavata, sar clade , archaeplastida, unikonta. But rest are land plants, fungi, and animals. Protist introduction: the very rst evolved 1. 5-1. 6 by a one billion years before plants, fungi and animals. Supergroup excavata: some members have a feeding groove. This group include the diplomonads, parabasalids, and euglenozoans: diplomonads. Mitosomes modi ed mitochondria etc non functional, cannot use o2, 2 equal-sized nuclei. Hydrogenosomes modi ed mitochondria, anaerobic metabolism, release h2 as a by-product, lack plastids. Sexually transmitted parasite causes the std trichomoniasis: euglenozoans. Kinetoplastids single, large mitochondrion contains kinetoplast (organized mass of dna) Ex: trypanosoma brucei causes african sleeping sickness in people. Rhizarians: stramenopiles hairy agellum usually paired with a shorter smooth . Diatoms, golden algae, and brown algae: diatoms photosynthetic cell wall like glass diatomaceous earth, golden algae photosynthetic. Fresh and marine nanoplankton: brown algae most complex all multicellular. Algin in cells walls polysaccharide holds water used as thickener in pudding, salad dressing, and hand lotion: alveolates.
