Margulis , Lynn

Margulis , Lynn
(1938–) American biologist
Margulis was educated at the university in her native city of Chicago, at Wisconsin, and at Berkeley where she obtained her PhD in 1965. After working briefly at Brandeis she moved to Boston University in 1966 and served there as professor of biology from 1977 to 1988. She became Distinguished Professor of the University of Massachusetts in 1988.
With the success of modern biochemistry, genetics, and cytology it became apparent that there was a fundamental division in nature between cells with nuclei (eukaryotes) and those without (prokaryotes). In terms of metabolism, chemistry, genetics, and structure, higher organisms differ radically from bacteria and blue-green algae, the prokaryotes. She studied the question of how eukaryotes evolve and her answer, in terms of hereditary endosymbiosis, was fully formulated in her Origin of Eukaryotic Cells (1970). She argued that eukaryotes are basically colonies of prokaryotes and that such features of cells as mitochondria were once free-living bacteria but have, “over a long period of time, established a hereditary symbiosis with ancestral hosts that ultimately evolved into animal cells.” Similarly she proposes that chloroplasts and flagella evolved in the same way.
The actual evolutionary sequence proposed begins with a ‘fermenting bacterium’ entering into a symbiotic relationship with some oxygen-using bacteria, the first mitochondria. Such a complex might join with “a second group of symbionts, flagellum-like bacteria comparable to modern spirochaetes,” which, attached to the host's surface, would greatly increase its motility.
As Margulis points out, the proof for such an imaginative model requires that the cell organelles are separated, cultured independently, and then brought back into symbiotic association again. So far no one has managed to grow an organelle outside the cell. Margulis published (with Karlene Schwartz) “a catalog of the world's living diversity” in Five Kingdoms (1982).

Scientists. . 2011.

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  • Margulis, Lynn — ▪ 2001       At a White House ceremony on March 14, 2000, Pres. Bill Clinton presented the U.S. National Medal of Science to eminent microbiologist Lynn Margulis, one of 12 distinguished recipients. She was cited “for her outstanding… …   Universalium

  • Lynn Margulis — en 2005 Nacimiento 5 de marzo de 1938 73 años …   Wikipedia Español

  • Lynn Margulis — Born March 5, 1938 (1938 03 05) (age 73) Chicago …   Wikipedia

  • Lynn Margulis — Pour les articles homonymes, voir Margulis. Lynn Margulis le 9 novembre 2005 Lynn Margulis (née en 1938) est une microbiologiste …   Wikipédia en Français

  • Lynn Margulis — Lynn Margulis, 9. November 2005 in A Coruña Lynn Margulis (* 5. März 1938 in Chicago als Lynn Alexander) ist eine US amerikanische Biologin und Professorin an der University of Massachusetts Amherst. Ihre bekannteste wissenschaftliche Leistung… …   Deutsch Wikipedia

  • Margulis — may refer to: Berl Broder (born Margulis), Broder singer Dan Margulis, author Grigory Margulis (born 1946), mathematician Margulis lemma Jura Margulis, pianist and pedagogue Lynn Margulis, biologist Margulis, a villain from the game series… …   Wikipedia

  • Margulis — ist der Familienname folgender Personen: Grigori Alexandrowitsch Margulis (* 1946), russischer Mathematiker Jura Margulis (* 1968), russischer Pianist und Musikpädagoge Lynn Margulis (* 1938), US amerikanische Biologin Mike Margulis (* 1950), US… …   Deutsch Wikipedia

  • Lynn — may refer to:Places;United States * Lynn, Alabama * Lynn, Arkansas * Lynn, Indiana * Lynn, Massachusetts * Lynn, Pennsylvania * Lynn, Wisconsin;United Kingdom * Lynn, a familiar local name for King s Lynn, NorfolkPeoplePeople with the surname… …   Wikipedia

  • Margulis — puede referirse a: Grigori Margulis, matemático ruso. Lynn Margulis, bióloga estadounidense. Vitaly Margulis, pianista y pedagogo ucraniano. Esta página de desambiguación cataloga artículos relacionados con el mismo título. Si llegaste aq …   Wikipedia Español

  • Lynn Margulis — (1938). Bióloga de origen estadounidense …   Enciclopedia Universal

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