Symbiogenesis

Under symbiogenesis refers to the fusion of two or more different organisms in a single new organism. The theory of symbiogenesis of Constantinople Mereschkowsky was founded in the early 20th century. She was then taken up by the American biologist Ivan Wallin and in the late 20th century by Lynn Margulis. The theory of symbiogenesis represents the extent complementary to the theory of evolution as the emergence of new cell organelles, organs or species is attributed to the symbiotic relationship between concentration and the individual species. Accordingly, from the symbiogenesis follows the possibility that pedigrees not only branch, but also can connect again.

A well-known example of symbiogenesis are lichens as a merger between fungi and green algae or cyanobacteria. Another scientifically now recognized example of symbiogenesis results from the endosymbiont theory. Accordingly, the origin of certain organelles ( plastids and mitochondria ) the eukaryotic cell is that unicellular organisms were incorporated without a nucleus of voreukaryotische primordial cells (so-called endocytosis ). In addition, it is also believed by Lynn Margulis and other representatives of the theory that flagella and cilia also of eukaryotes may have evolved from endosymbiotic spirochetes. This hypothesis is controversial among evolutionary biologists, since the organelles do not have a standalone DNS.

In the opinion of Lynn Margulis and Dorion Sagan, life has conquered the world not by fighting, but by cooperation (Life did not take over the globe by combat, but by networking ).