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Speciation in Medical News

How new species evolve is focus of public lecture at UC Riverside

... RIVERSIDE, Calif. What is a species and how does speciation the evolutionary process that results in the formation of new species com...k, a professor of biology at UCR. "I will introduce concepts of species and speciation that came before Darwin, show how he changed our understanding of these con...

Crystallography reveals the 3-D structure of mammalian sperm receptor

...at extend beyond the field of reproduction. Among other things, an unexpected parallel has been uncovered with molecular features that are involved in speciation among invertebrates. Moreover, ZP-N domains are also found in many other extracellular proteins that are unrelated to fertilization, but play impo...

EPA scientists recognized with prestigious honor

...cie-Lynn Nadeau. Elucidating Basic Controls on Transformations of Aquatic N(org), Essential Knowledge for Addressing Eutrophication: Groundwater N speciation and Redox Control of Organic N Mineralization by O 2 Reduction to H 2 O 2 Geochimica Et Cosmochimica Acta (GCA), 70:3533-3548 (2006). John W. Was...

January American Naturalist highlights

...n (Ludwig-Maximilians University) Under which circumstances is sympatric speciation possible" An answer to this long-standing question of evolutionary biology ...tion model by Ulf Dieckmann and Michael Doebeli, who investigated sympatric speciation driven by resource competition. They then simplified the assumptions of thi...

Another Sexual Attraction is Possible ...

...that is particularly well-suited to study the first steps along the road to speciation and the deep mysteries of reciprocal attraction - or lack thereof - between...re. These results suggest that the role of pheromone divergence in speciation may not be quite as strong as previously thought - at least within this mod...
Speciation in Biological News

X-effect: female chromosome confirmed a prime driver of speciation

Researchers at the University of Rochester believe they have just confirmed a controversial theory of evolution. The X chromosome is a strikingly powerful force in the origin of new species. Biologists have argued for years whether the X chromosomethe female chromosome in most animalsplays a spec...

University biologist publishes book on bird speciation

A University of Chicago biologist and world-renowned expert on bird speciation has compiled eight years of research and writing into a recently published book, Speciation in Birds. Trevor Price, professor of ecology and evolution at Chicago, evaluates the contributions of sexual selection and n...

Auto immune response creates barrier to fertility; could be a step in speciation

Plant biologists at the Max Planck Institute of Developmental Biology and the University of North Carolina at Chapel Hill have discovered that an autoimmune response, triggered by a small number of genes, can be a barrier to producing a viable offspring. Studying Arabidopsis thaliana, sometimes...

Sunflower speciation highlights roles for transposable elements in evolution

In a finding that furthers our understanding of how hybridization may contribute to genome changes and the evolution of new species, researchers have found that the genomes of three sunflower species that arose in evolution as hybrids of the same two parental types have undergone a massive prolifer...

A global model for the origin of species independent of geographical isolation

...characteristics within a species, which encourages divergence as members fill different roles in an ecosystem. In a new study, "Global patterns of speciation and diversity," just published in Nature , Les Kaufman, Boston University professor of biology and associate director of the BU Marine Program along ...

Evolution: Crabs go deep to avoid hot water

... Journal of Biogeography , reveal temperature as a driving force behind the speciation and radiation of a major seafloor predator; globally, and over tens of mill...change." This study elucidates temperature as a driving force behind the speciation and radiation of a major seafloor predator globally and over tens of millio...

A genome may reduce your carbon footprint

...cs. A comprehensive survey of genetic diversity would help guide conservation efforts to preserve germplasm diversity and allow reconstruction of past speciation events at a more detailed level. As a result of access to multiple related genomes, similarities between closely related species would allow infere...

2009 ASPB Summer Undergraduate Research Fellowship award announcement

...s that share our environment. Starr Matsushita, University of Puget Sound Mentor: Andreas Madlung A role for aneuploidy as a means for hybrid speciation in the genus Arabidopsis I am incredibly happy to receive such a prestigious fellowship for the summer of 2009. I extend a warm thanks to the ASPB ...

UBC study first to show evolution's impact on ecosystems

... a UBC post-doctoral fellow who is now a researcher at Eawag, the Swiss Federal Institute of Aquatic Science and Technology. "It also demonstrates how speciation of a predator might alter the evolutionary course of other organisms in the food web." "As new species arise from a common ancestor and evolve new ...

April 2009 Geology and GSA Today media highlights

...ngered species management have been applied in a novel approach to vadose-zone hydrology and paleohydrology. By establishing the synchrony between the speciation of cave fauna and the activation of discrete segments of the aquifer recharge zone, White et al. present a new set of tools to hydrologists and to man...
Speciation in Biological Technology

Speciation of Arsenic by LC-ICP-MS

...e results in a single screen. Elemental speciation speciation of the fi ve inorganic and organic arsenic species... 3. K. Ackley, C. BHymer, K. Sutton, J. Caruso, speciation of Arsenic in Fish Tissue Using Mircowave-Assited ...
Speciation in Biological Products

Varian 810-MS from Varian, Inc.

Description:...ions. Fully integrated LC-ICP-MS using Varian Galaxie chromatography software and Varian ICP-MS Expert software, making elemental and molecular speciation easy. *Patents pending...
Company:Varian, Inc.

Varian 820-MS from Varian, Inc.

Description:...ions. Fully integrated LC-ICP-MS using Varian Galaxie chromatography software and Varian ICP-MS Expert software, making elemental and molecular speciation easy. *Patents pending...
Company:Varian, Inc.
Speciation in Biological Definition

Speciation

Speciation refers to the appearance of a new species of life on earth, particularly as seen in the fossil record . There are many ideas about the process leading to the creation of new species, each typically based on any of the Darwinian theories of biological evolution . Most of these id...

Adaptive radiation

... Adaptive radiation describes the rapid speciation of a single or a few species to fill many ecological niches . This is an evolutionary process driven by mutation and natural selection . Ad...

Evolution

... 1.4 Microevolution and macroevolution 1.5 speciation and extinction 2 Evolutionary biology ... usually taken to refer to events that result in speciation , the evolution of a new species . An absolute d... in two populations of organisms so different that speciation can be said to have occurred. ...

Extinction

...are now extinct. In the theory of evolution , new species are created by speciation — where new organisms arise and thrive when they are able to find an...ing more frequent. The founder effect can cause rapid, individual-based speciation and is the most dramatic example of a population bottleneck. Habitat d...

Gene duplication

... This is opposed to orthologous genes that code for proteins with similar function but that exists in different species. Orthologs are created from a speciation event. (See Homology of sequences in genetics ) It is important (but often hard) to differentiate between paralogs and orthologs in biological res...

Genetics

...orces: natural selection , genetic drift , mutation and migration . It is the theory that attempts to explain such phenomena as adaptation and speciation . The related subfield of quantitative genetics, which builds on population genetics, aims to predict the response to selection given data on the ...

Lynn Margulis

...: On the Evolution of Human Sexuality , Summit Books, ISBN 0671633414 Margulis, Lynn, ed, 1991, Symbiosis as a Source of Evolutionary Innovation: speciation and Morphogenesis , The MIT Press, ISBN 0262132699 Margulis, Lynn, 1992, Symbiosis in Cell Evolution: Microbial Communities in the Archean and Pr...

Microevolution

... Because microevolution can be observed directly, both pro-evolution and some anti-evolution groups agree that it is a fact of life. See also speciation , Molecular evolution , Population genetics ...

Modern evolutionary synthesis

...ther as a result of genetic drift , gene flow and natural selection . speciation occurs gradually when populations are reproductively isolated by geographi...thematical, analyses of phenomena such as kin selection , altruism , and speciation . A particular interpretation of neo-Darwinism most commonly associated...

Population genetics

...nt of population subdivision and population structure in space. As such, it is the theory that attempts to explain such phenomena as adaptation and speciation . Population genetics was a vital ingredient in the modern evolutionary synthesis , its primary founders were Sewall Wright , J. B. S. Haldane and...
Speciation in Biological Dictionary

Speciation

Speciation is the evolutionary process by which new biological species arise. The biologist Orator F. Cook seems to have been the first to coin the term ' speciation ' for the splitting of lineages or 'cladogenesis,' as opposed... Allopatric and allopatry are terms from bio...

Sympatric

... some places. If these organisms are closely... speciation is the evolutionary process by which new biologica...by differences in ... sympatric ... Sympatric speciation - Wikipedia, the free encyclopedia ... posted to sympatric speciation sexual selection by jlin on 2009-07-15 22:00:...

Punctuated equilibrium

... Introduction to Stephen Jay Gould and Niles Eldredge's model for one kind of evolutionary change. punctuated equilibrium n. The theory that speciation occurs in spurts of major genetic alterations that punctuate long periods of little Looks at how PE provides paleontologists with an explanation...

Pleiotrophy

...| skip to sidebar. Pleiotropy . Scientia Pro Publica 9 - with a twist ... the effects of epistasis and pleiotropy on adaptation, and sympatric speciation ... What is pleiotropy ? Pleiotropy comes from the Greek πλείων pleion, meaning "more", and τρέπειν ... of epistasis and pleiotropy on adap...

Isozyme

...Genome. Six Sigma Course ... Information about isozyme in the free online English dictionary and encyclopedia. ... Isozyme evidence of lack of speciation between wild an domestic Triatoma ... Zoology information, history, articles and research from Academic Journals, Newspapers, and magazines at Hig...

Gene pool

... the gene pool of a species, how new species are created and the way the gene pool alters to suit the environment. ... The Gene Pool and speciation ... Genetics News Genetic Online Research Gene - Pool Job Career Online Degree Bio Program College Genetics Degree ... News Scan: ==> Gene - ...

Experimental evolution

... W. ... Network for Experimental Research on Evolution (NERE) Nunney, ... Categories: adaptation · experimental evolution · neurospora · speciation ... Tags: bacteria, experimental evolution , journal club, lichen, symbiosis, tiling array ... APA Monitor article (Dec 1999) briefly traces th...

Euploidy

...ypic Effects of Aneuploidy. Genetics of Aneuploidy ... Euploidy and Plant speciation ... Euploidy . Euploidy . Variation in the number of complete sets of ...arles L. Asbury ... Euploidy appears to be the least favoured form of speciation in orchids, less ... The cases of euploidy are rather scarce in orchids....

Anagenesis

... gene ... Modes: anagenesis - catagenesis - cladogenesis ... 3/2/2006: Anagenesis ... " Anagenesis , not mentioned in your text, refers to speciation (origin of new ... " Anagenesis acknowledges that the species of today, ... Anagenesis . Details. Comments. More from user. Anagenesis - 08:...

Allopolyploidy

...tion ( in evolution (scientific theory): Polyploidy ) ...mode of quantum speciation that yields the beginnings of a new species in just one or two generatio...gree of genetic variation ... Allopolyploidy is a prominent mode of speciation in flowering plants. On allopolyploidy , genomic changes can take place, ...
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