01:119:116 Lecture Notes - Lecture 1: Enterobacteria Phage T4, Lytic Cycle, Facultative Anaerobic Organism
2 Feb 2016
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Systematics scientific study of diversity of organisms & evolutionary relationships. Two parts: taxonomy- science of describing, naming, and classifying organisms- binomial nomenclature, phylogeny- evolutionary history of a species or group of related species. The taxonomic groups from broad to narrow are domain to species. Taxon- grouping of organisms at any one of these levels. Represents an evolutionary hypothesis: clades- monophyletic, paraphyletic, polyphyletic. What is the definition of evolution-he process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth. How about natural selection-the process whereby organisms better adapted to their environment tend to survive and produce more offspring. Tree of life with 3 domains [figure 26. 21 in textbook] General characteristics: non-living [what makes something alive?, very small [20 to 300m, genetic material [type, shape, size, capsid- a protein coat that surrounds nucleic acid- made of capsomeres, envelopes [only some, obligate intercellular parasites.
