NATS 1940 Lecture Notes - Lecture 1: Georges Cuvier, Dental Caries, Peptidoglycan
14 Nov 2018
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Domain bacteria (aka eubacteria) (many kingdoms: features of bacteria. Shapes; spheres (=cocci), rods (=bacilli), corkscrews (=spiral bacteria: most living biomass of any domain. In water, soil, air; on and in plants and animals: most are harmless or beneficial, approx. 3% of known species cause disease in humans: cell wall containing peptidoglycan. Cell wall extremely variable, but no peptidoglycan. Do not cause disease (except, possibly, tooth decay) Europe, 1700s: natural theology: =the study of nature in order to better understand god, biology tied to religion. Fossils: =remains or impressions of organisms from the past, mineralized in rocks, often do not resemble living species, sometimes found in strange places (e. g. seashells on mountain tops, study= paleontology. Georges theory: catastrophism: droughts, fires, floods and other catastrophes periodically wip out local organisms, other organisms immigrate into the area from surrounding areas to replace them, some new species may also be created supernaturally.
