BIOL-UA 12 Lecture Notes - Lecture 1: Jan Baptist Van Helmont, Carl Linnaeus, Binomial Nomenclature
18 Mar 2016
School
Department
Course
Professor
Document Summary
Eichenberger - microbiology & introduction to animal biology. Biogenesis: every living organism comes from a pre-existing living organism tree of life w/ only 1 root. Heterogenesis: some life forms arise spontaneously from non-living matter (i. e. decaying matter, broth) spontaneous generation (many roots) Aristotle: there are four elements earth, air water and fire (5th = quintessence or ether) Louis pasteur: challenged the belief of spontaneous generation. Experiment: place a soiled shirt in a vessel containing grains of wheat and after appox 21 days you will create mice. The part it suggested thought was real: if you take water from a spring and put it in a flask you will give rise to maggots, frog eggs, et. Francesco redi (redi"s key observation) - first modern experiment in biology (1668) Theory: all worms that are found in meat were derived directly through the dropping of flies but not from the putrefaction (rotting) of the meat. Positive control: take meat, wait, let maggots create.
