BIOL165 Lecture Notes - Lecture 8: Euglenozoa, Polyphyly, Euglena
4 Feb 2017
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Know about haploid and diploid for midterm. I(cid:374)clude parasites i(cid:374)cludi(cid:374)g giardiasis (cid:894)hiker"s diarrhea(cid:895), chaga"s disease, leish(cid:373)a(cid:374)iasis (kala-azar), african sleeping sickness, and stds. Diplomonads are small heterotrophic protists with no mitochondria (lost but have genes derived from them) Some are free living in fresh water, but most are commensalists in the intestine of animals: phylum diplomonadida. Natural immunity to giardia is nearly impossible. Cysts ingested with contaminated water or food. Cysts excyst and trophozoites colonize small intestine. Reservoir hosts (beavers often implicated as potential reservoirs: phylum kinetoplasta. Picked chloroplasts up from green algae in a secondary endosymbiotic event. 3 membranes around chloroplasts (so not primary) 1 long apical flagella, tinsel type, 1 short second flagella. Heterotrophs will feed using pinocytosis striated pellicle. Metaboly- euglenoid moving contracting and squeezing the cell. Divide through binary fission from the flagella pocket. Diplonemids are prevelant in the marine environment and predators.
