Lynn Margulis.doc
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Lynn Margulis Melissa Lyons 9/13/09 Period#2 Lynn Margulis was the oldest of four daughters, she was born in Chicago on March 5, 1938. Morris Alexander is her father, who was a lawyer who owned a company that made and sold a material used to mark streets and highways. Leone was her mother who operated a travel agency. When Margulis was fifteen, she finished her second year at Hyde Park High School and was accepted into an early entrant program at the University of Chicago. She received her Ph.D. in 1963 from UC Berkeley. She wrote a hypothetical paper entitled The Origin of Mitosing Eukaryotic Cells. The paper however was rejected by about fifteen scientific journals. It was finally accepted by The Journal of Theoretical Biology and is considered today a landmark in modern endosymbiotic theory. Even though it comes from symbiosis ideas first put up by mid-19th century scientists and by Merezhkovsky and Wallin in the early-20th century, Margulis's endosymbiotic theory formulation is the first to rely on direct microbiological observations. The paper was at first seriously rejected, as symbiosis theories had been dismissed by mainstream biology at the time, weathering constant disapproval of her ideas for decades. She is famous for her persistence in
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Lynn Margulis
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Lynn Margulis
Lynn MargulisMelissa Lyons 9/13/09
Period#2
Lynn Margulis was the oldest of four daughters, she was born in Chicago on March 5, 1938. Morris Alexander is her father, who was a lawyer who owned a company that made and sold a material used to mark streets and highways. Leone was her mother who operated a travel agency. When Margulis was fifteen, she finished her second year at Hyde Park High School and was accepted into an early entrant program at the University of Chicago.She received her Ph.D. in 1963 from UC Berkeley. She wrote a hypothetical paper entitled The Origin of Mitosing Eukaryotic Cells. The paper however was rejected by about fifteen scientific journals. It was finally accepted by The Journal of Theoretical Biology and is considered today a landmark in modern endosymbiotic theory. Even though it comes from symbiosis ideas first put up by mid-19th century scientists and by Merezhkovsky and Wallin in the early-20th century, Margulis's endosymbiotic theory formulation is the first to rely on direct microbiological observations. The paper was at first seriously rejected, as symbiosis theories had been dismissed by mainstream biology at the time, weathering constant disapproval of her ideas for decades. She is famous for her persistence in pushing her theory forward, even with the conflict she faced at the time.Her most important scientific contribution is the endosymbiotic theory of the origin of mitochondria as separate organisms that long ago begin a united relationship with eukaryotic cells through endosymbiosis.
The endosymbiotic theory applies to the origins of mitochondria and chloroplasts, which are organelles of eukaryotic cells. It says these originated as prokaryotic endosymbionts, which started to live inside eukaryotic cells. The theory guesses that the mitochondria evolved from aerobic bacteria, and that the chloroplast evolved from endosymbiotic cyanobacteria. The evidence for this theory is convincing, and it is now generally accepted.http://www.isepp.org/Pages/San%20Jose%2004-05/MargulisSaganSJ.htmlhttp://en.wikipedia.org/wiki/Lynn_Margulishttp://www.answers.com/topic/lynn-margulis
