01:119:101 Lecture 5: January 28- Protists (Chapter 28)
25 Feb 2016
School
Department
Course
Professor
Document Summary
January 28, 2014 lecture 3 protists chapter 27. 1-27. 5. In the evolution of plastids; the endosymbiant was a photosynthetic cyanobacterium: the host in this relationship were heterotrophic eukaryotes. Excavata: they all have an excavated feeding groove on one side of the cell body, within this supergroup we have the diplomonods, characteristics of this group: Lack plastids a: mitosomes very reduced mitochondria lack functional etc and they cannot use oxygen to extract energy from organic molecules. Lives in small intestine. known as backpackers diarrhea: major cause of diarrheal diseases throughout the world, parabasalids, characteristics: When light is not available they can do fine with heterotrophic living situations. Sar clode supergroup: stramenopiles , alveolates , rhizarians, stramenopiles, flagellum fine, hair like projections hairy , usually paired with sooth flagellum. Look at fig 28. 9 & fig 28. 10: diatoms, photosynthetic unicellular algae, cell wall silicon dioxide gives great strength to the cell wall.
