spontaneous generation
: ancient belief: life can arise from nonliving matter
Key scientists of spontaneous generation
: Francesco Redi, John Needham, Lazzaro Spallanzani
Francesco Redi
: This scientist disproved spontaneous generation by showing that maggots do not
spontaneously arise from ...
1 | P a g e Microbiology UTA 2460 Chapter 3 Correctly Answered Questions | UpToDate | Already Graded A+ spontaneous generation 🗸🗸🗸: ancient belief: life can arise from nonliving matter Key scientists of spontaneous generation 🗸🗸🗸 : Francesco Redi, John Needham, Lazzaro Spallanzani Francesco Redi 🗸🗸🗸 : This scientist disproved spontaneous generation by showing that maggo ts do not spontaneously arise from decaying meat. John Needham 🗸🗸🗸 : Believed there was a life force that caused spontaneous generation Lazzaro Spallanzani 🗸🗸🗸 : replicated redi and needham's experiments, disproved of spontaneous generation Louis Pasteur 🗸🗸🗸 : Disproved of spontaneous generation, swan neck experiment (won Alhumbert prize) 2 | P a g e Modern Cell Theory 🗸🗸🗸 : All living organisms are composed of one or more cells 2 Basic Tenents of Modern Cell Theory 🗸🗸🗸 : 1. Cell is a basic unit of structure 2. All cells come from existing cells (recall spontaneous generation) People of Cell Theory: Tenet 1 🗸🗸🗸 : 1. Robert Hooke - cork tissue 2. Matthias Schleiden - plant tissue 3. Theodor Schwann - compared plant and ani mal cells People of Cell Theory: Tenet 2 🗸🗸🗸 : 1. Robert Remak - cells come from other cells (i.e. cell division) 2. Rudolf Virchow -published Cellular Pathology (all cells arise from cells) Endosymbiotic Theory 🗸🗸🗸 : Origin theory about cellular st ructures (how Mitochondria and chloroplasts were originally prokaryotic cells) 3 | P a g e Famous scientist: Konstantin Mereschkowski, Ivan Wallin, Lynn Margulis Konstantin Mereschkowski (1905) 🗸🗸🗸 : Proposed that chloroplasts could reproduce independently and m ust have lived outside plant cell (said DNA could be found in organelles) Ivan Wallin (1926) 🗸🗸🗸 : showed mitochondria outside of cell (but likely contamination) also said DNA could be found in organelles Lynn Margulis (1967) 🗸🗸🗸 : mitochondria and chloroplasts are of prokaryotic origin - DNA, ribosomes, binary fission Germ Theory of Disease 🗸🗸🗸 : Diseases may result from microbial infection Famous scientist: Girolamo Fracastoro, Ignaz Semmelweis, John Snow, Louis Pasteur, Josep h Lister, Robert Koch Girolamo Fracastoro (1546)
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