منابع مشابه
Symbiosis
What is in store for the guppy? Variation is essential to understanding the genetics underlying biological processes. The guppy provides a huge amount of natural variation that can be studied genetically. This variation has not been produced by mutagenesis screens, but instead has been shaped by natural selection. Thus, combined with emerging genomic resources, the guppy is an ideal organism fo...
متن کاملSymbiosis, Synergy and Modularity: Introducing the Reciprocal Synergy Symbiosis Algorithm
Symbiosis, the collaboration of multiple organisms from different species, is common in nature. A related phenomenon, symbiogenesis, the creation of new species through the genetic integration of symbionts, is a powerful alternative to crossover as a variation operator in evolutionary algorithms. It has inspired several previous models that use the repeated composition of pre-adapted entities. ...
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We have derived simplified equations for a freely expanding, pressure driven jet model as a function of jet power and applied it successfully to the radio cores in the black hole candidates GRS 1915+105, NGC 4258, and M81 which are observationally well defined systems, and to Sgr A*. By using equipartition assumptions, the model has virtually no free parameters and can explain all sources by ju...
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A dominant theme in the history of life has been the evolutionary innovations of cooperative symbioses: the first genomes near the origin of life, integrated prokaryotic cells, the complex symbiotic communities that evolved into modern eukaryotic cells, lichens, mycorrhizae, and so on. In this paper, a model of cooperative symbiosis that shows a threshold condition for the evolution of cooperat...
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A role of ion channels in the interactions between bacterial pathogens and their animal hosts is well established. In some cases, regulation of endogenous channels in the target species is disrupted by bacterial toxins, resulting in an alteration of ion flux and a perturbation of cellular function (1). In a more extreme example, hemolytic bacteria actually insert poreforming proteins into the p...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 1992
ISSN: 0028-646X,1469-8137
DOI: 10.1111/j.1469-8137.1992.tb00067.x