BIL 160 Lecture Notes - Lecture 6: Methanosarcina Acetivorans, Great Salt Lake, Spirillum
3 Aug 2018
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Domain archaea: earliest life on earth: the earliest known fossil organisms look like archaeans, earth"s first i(cid:374)ha(cid:271)ita(cid:374)ts spe(cid:374)t their first 2 (cid:271)illio(cid:374) (cid:455)ears as the o(cid:374)l(cid:455) life o(cid:374) earth. Lake: generally, have an unpleasant smell, they owe their salt tolerance to, high lipid content of plasma membrane, protective gel capsule outside the membrane, high internal salt concentration. Domain bacteria: the most successful life forms: common ancestry may never be known, described as diverse, ubiquitous, ecologically vital, economically important. There may be: convergence (ex: spirillum and spirochete, a diversity of shapes in closely related bacteria (ex: spirillum and vibrio, shape is useful for grouping and identifying on a visual basis. Bacterial reproduction: bacterial cells can be grown in culture on appropriate nutrient media (e. g. agar with broth). In an animal that is immunocompromised, however, they can proliferate and cause infection: pseudomonas can be an opportunistic pathogen.
