Navigation Links
Symbiogenesis


Symbiogenesis refers to the merging of two separate organisms to form a single new organism. The idea originated with Konstantin Mereschkowsky in his 1926 book Symbiogenesis and the Origin of Species, who proposed that chloroplasts originated from cyanobacteria captured by a protozoan. Today both chloroplasts and mitochondria are believed to have such an origin; see endosymbiotic hypothesis.

In Acquiring Genomes: A Theory of the Origins of Species, Lynn Margulis argued that symbiogenesis was the primary force in evolution. According to her theory, acquisition and accumulation of random mutations are not sufficient to explain how inherited variations occur, and new organelles, bodies, organs, and species arise from symbiogenesis. Whereas Darwin emphasized competition as the main force behind evolution, Margulis emphasizes cooperation.

However, this idea has little support from other evolutionary biologists. While symbiogenesis has had a major impact on eukaryotic life, little of its diversification can be attributed to it. For instance, the origin of mitochondria made the development of animals possible, but there is no indication of other symbiogeneses that separated the different phyla.


'"/>


(Date:3/17/2015)... 2015 Emotient, the leader in facial ... general availability of Emotient Analytics , the ... of facial expressions. The system analyzes videos of ... and services. It delivers audience response metrics - ... as derived from facial evidence of emotional states. ...
(Date:3/12/2015)... -- The mascots of the Atlantic Coast Conference spent ... Forest Baptist Medical Center. They stopped by as part ... Basketball Tournament. Young patients enjoyed bonding with their favorite ... Brenner Children,s Hospital is the pediatric arm ... hospital in northwest North Carolina ...
(Date:3/11/2015)... , March 11, 2015   The ... its platform to scientifically measure and harness music ... to real-time biometrics and objective measurements of physiology, ... music at scale in large populations. It is ... technologists and clinicians perform rigorous studies and accelerate ...
Breaking Biology News(10 mins):New Emotient Web Service Measures Audience Response Using On-Demand Facial Expression Analysis 2New Emotient Web Service Measures Audience Response Using On-Demand Facial Expression Analysis 3New Emotient Web Service Measures Audience Response Using On-Demand Facial Expression Analysis 4Introducing The Sync Project, a Global Collaboration Harnessing the Scientific Potential of Music for Health 2Introducing The Sync Project, a Global Collaboration Harnessing the Scientific Potential of Music for Health 3
... across the country gained a valuable tool last week, ... hand-held device to detect life-threatening bleeding in the brain. ... initiated and funded by the Office of Naval Research ... hematomas soon after an injury, and could be a ...
... 2011) University of Miami biology professor Akira Chiba ... systematic survey of protein interactions within brain cells. The ... interaction networks (isPIN) within the neurons of a multicellular ... for Cell Biology annual meeting, December 3 through 7, ...
... (ITG) discovered a parasite that not only had developed resistance ... become better in withstanding the human immune system. With some ... appears the battle against the drug also armed the bug ... first time such a doubly armed organism appears in nature", ...
Cached Biology News:Naval technology could be a lifesaver 2How the brain cell works: A dive into its inner network 2Do our medicines boost pathogens? 2Do our medicines boost pathogens? 3
Other biology definitionOther Tags