On November 22, , Lynn Margulis, visionary biologist and tireless champion of the microbial world, died of a massive stroke. Similarly, she hypothesized that the mitochondrion descended from an endosymbiotic bacterium capable of aerobic respiration. Unbeknownst to Lynn at the time, the Russian biologist Konstantin Merezhkovsky had published a similar proposal as early as Some 15 journals rejected her first paper on endosymbiosis before it found a home in Journal of Theoretical Biology 1. However, Margulis did more than rediscover endosymbiotic theory; she restated it in the then emerging language of cell and molecular biology, opening the idea to scientific test. In time, cell biologists showed that the chloroplast and mitochondrion are isolated from the rest of the cell by a set of enveloping membranes; moreover, both organelles contain DNA, previously thought to be restricted to the nucleus.

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Wilson en Wallin, Konstantin Mereschkowski y A. Ello ye que los cuatro reinos restantes venimos de esi saltu cualitativu. Agora llogremos cada pasu, y eso ye noticia. Pa entender esti esquema hai qu'escoyer cada elementu y ponelo n'orde porque na naturaleza esti orde nun esiste.

Rellaciones qu'en principiu pudieron ser parasitarias aportaron a mutualistes. Esto ye inaceptable. Les variaciones heredables son causaes por mutaciones, y estes son aleatories. Conxuntos enteros de xenes, ya inclusive organismos completos col so propiu xenoma, son asimilaos ya incorporaos por otros. Dende les bacteries hasta les secuoyas, dende'l fitoplancton hasta los castores, la crecedera y el metabolismu de tolos organismos modifica'l mediu nel que viven. Ella ye'l personaxe central.

Margulis sobre la so clase de Ciencies Naturales II [11]. Javier Sampedro , Deconstruyendo a Darwin. Richard Dawkins , El reloxeru ciegu. Margulis, Captando xenomes. Isabel Esteve, UAB. Margulis y Dorion Sagan, Captando xenomes [31]. Perfil de Lynn Margulis en global talent. The New York Times. PMID Freeman J. University of Massachusetts. J Theor Bio. Ledmyard Stebbins, , p. Growth of biological thought. Harvard University Press , Cambridge.

Lynn Margulis. Vistes Lleer Editar Editar la fonte Ver historial. N'otros proyeutos Wikimedia Commons Wikiespecies. Lynn Margulis en Ivan Wallin.


Lynn Margulis

Lynn Margulis born Lynn Petra Alexander ; [2] [3] March 5, — November 22, [4] was an American evolutionary theorist, biologist, science author, educator, and science popularizer, and was the primary modern proponent for the significance of symbiosis in evolution. Historian Jan Sapp has said that "Lynn Margulis's name is as synonymous with symbiosis as Charles Darwin 's is with evolution. Margulis was also the co-developer of the Gaia hypothesis with the British chemist James Lovelock , proposing that the Earth functions as a single self-regulating system, and was the principal defender and promulgator of the five kingdom classification of Robert Whittaker. Called "Science's Unruly Earth Mother", [8] a "vindicated heretic", [9] or a scientific "rebel", [10] Margulis was a strong critic of neo-Darwinism.

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Lynn Margulis, 1938–2011



Lynn Margulis, la bióloga que reinventó la teoría de la evolución


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