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| established the sysem of scientific nomenclature |
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proposes that a common ancestor cell gave rise to three different cell types [bacteria, archaea, and eukarya] -evolutionary model of classification based on differences in the sequences of nucleotides in the cell's ribosomal RNA as well as the cell's membrane lipid structure and its sensitivity to antibiotics |
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-prokaryotic -lack cell wall -live in extreme enviroments |
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-prokaryotes -pepitoglycan cell walls -division by binary fission |
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-eukaryotes -rigid cell wall made of chitin -yeasts are unicellular |
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-eukaryotes -cellulose cell walls |
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-eukaryotes, single celled |
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-acellular -consist of DNA or RNA core -core is surrounded by protein coat -coa may be enclosed in a lipid envelope -replicated only when they are in a living host cell |
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-reported that living things were composed of little boxes or cells |
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| -said cells arise from preexisting cells [cell theory] |
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| described live microorganisms that he observed in teeth scrapings, rain water, and peppercorn infusions |
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| hypothesis that living organisms arise from nonliving matter |
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| -made first vaccine for smallpox by using cowpox |
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| organisms responsible for diseases |
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