01:119:116 Lecture Notes - Lecture 3: Giardia Lamblia, Symbiogenesis, Red Algae

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:116
• Professor: Keating

Document Summary

Protists - lecture 3: eukarya, cellular structure, nucleus and membrane bound organelles, cytoskeleton fiber. Structural support: how do they evolve, endosymbiosis: a relationship between 2 spp - one organism lives inside another organism, evolutionary history: mutual benefit to the both of them, serial endosymbiosis. Key organelles evolved through a sequence of endosymbiotic events: primary endosymbiosis. Phagocytosis of a bacterium by another cell. Mitochondria: anaerobic cell engulfed an aerobic bacterium: engulfed bacterium was an alphaproteibacterium -> endosymbiont, excercise on pg 589, host cell: archaea lineage, -> mitochondria arose only once over cause of evolution. Plastids arose after mitochondrial lineage gave rise to 2 lineages of phosyntetic protists lineage gives rise to 2 lineages of photosynthetic protists: red algae, green algae, secondary endosymbiosis. Host cell from primary endosymbiosis is engulfed by another cell: red algae + green algae underwent s. e. frequently which leads to the diversity of plastids, frequently => diversity of plastids figure 28. 3, eukaryotic evolution.