BIOL 1F90 Lecture Notes - Lecture 25: Methanopyrus, Extremophile, Cyanobacteria
3 Mar 2016
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Make a drawing that shows the evolutionary relationship between the domains of archaea, bacteria, and eukarya. Explain why many species of archaea are known as extremophiles Describe the structural differences between gram positive and gram negative bacterial cells. One of the most prominent features of the bacteria and archaea is their diversity. High temperatures methanopyrus grows in deep-sea thermal vents at 98 degrees celsius. 50 or so bacterial phyla o o o. Structural and metabolic features of half remain unknown. Some are extremophiles but many more bacteria found in moderate conditions. Many form symbiotic relationships (both good and bad) with eukaryotes. Photosynthetic bacteria abundant in fresh waters, oceans, and wetlands and on surfaces of arid soils. The only prokaryotes that generate oxygen as a product of photosynthesis. Gave rise to plastids/chloroplasts of eukaryotic algae and plants. Cyanobacteria display the greatest structural diversity found among bacterial phyla (single cells, colonies, filaments) Bacteria and archaea evolved from a common ancestor.
