Tag: "evolution" at biology news
Don't stand so close to me: A new view on how species coexist
...ommunities don't rub shoulders too closely because evolution
has caused them to compromise on key life measures...fference necessary," says Dr Bonsall. "This allows evolution
to affect patterns of diversity such as how many similar species we see." Dr. Vincent Jansen, author...
Of lice and men
...findings conflict with two major theories of human evolution
the "replacement model" and "multiregional model" and instead fit best with a third theory known as the "diffusion wave model." (1) The replacement model says that after primitive human ancestors first left Africa about 2 million yea...
'Immediately open access' option for the leading journal Genome Research
..., comparative and functional genomics, proteomics, evolution
studies, systems biology, bioinformatics, epigenetics, and technology are published as research papers in the form of articles and letters, or methods and resource reports. Complete data sets are presented electronically on the journal's web site whe...
Botulism bug says no to nitric oxide, provides key to molecule's role in human cell signaling
...or the journal Science. The paper also details how evolution
transformed one of nature's simplest molecules, nitric oxide (NO), from a toxin to anaerobic bacteria the planet's oldest life form into a beneficial signaling molecule in higher animals. It also offers an explanation for how the decades-old pract...
Yale scientists find cooperative RNA switches in nature
...ave been needed in an "RNA World" - or a period in evolution
where RNA served a much larger role," said Ronald...including using a process that simulates Darwinian evolution
in the test tube, they looked for naturally occurring riboswitches. Other authors on this paper incl...
Rutgers-led research offers new clues in the genetic mysteries of maize
...a series of different pests which may well lead to evolution
on a fast track." While the findings offered in the four newly published papers provide exciting, new glimpses into the nature of maize, Messing stressed the need for the completion of a whole genome sequence, a more detailed analysis of gene expres...
Study in Royal Society journals presents evidence for inherited factors in homosexuality
...drews Sexual selection, natural selection and the evolution
of dimorphic coloration and ornamentation in agami... selection from predators therefore constrains the evolution
of sexually selected traits in dragon lizards. Contact: Dr Terry Ord, Department of Biology, Indiana...
Laboratory test of evolutionary theory confirms importance of links between populations
...t Stanford. According to Thompson, the history of evolution
and the diversification of life on Earth is fundamentally a history of the evolution
of species interactions, or coevolution. Thompson is a leading proponent of the geographic mosaic th...
Arctic mystery no longer: Dinosaurs walked Canada's great north
...pmental biology. His main pursuit is to track the evolution
of one species and their development. In Niger alone, his explorations with University of Chicago palaeontologist Paul Sereno led to the discovery of eight unknown dinosaur species and five new crocodile species. Read more on Larsson at www.mcgill.c...
Pushing the envelope to overcome HIV drug resistance
of resistance to currently prescribed HIV-1 protease inhibitors is devastating to patients and is surprising given the way these drugs work. Protease inhibitors are all small-molecule, competitive, active-site inhibitors--low molecular weight compoun...
For inferring the biological tree of life, simple is better
...cience, used a small supercomputer to simulate the evolution
of thousands of gene sequences on a hypothetical e...re not convinced by these studies, which simulated evolution
using a simplistic and unrealistic process in which the various parts of a gene evolve at the same r...
Insects implicated in the evolution of new human infectious diseases
...ects and other invertebrates are the arena for the evolution
of new infectious diseases in humans, new research shows. Scientists now believe that not only are insects the carriers of some existing diseases but they are also the vehicle where recently emerging highly infectious diseases, such as the plague tha...
Emory study details dolphin brain evolution for the first time
...reased significantly in two critical phases in the evolution
of odontocetes. The first increase occurred with the origin of odontocetes from the ancestral group Archaeoceti nearly 39 million years ago, and was accompanied by both an increase in brain size and a decrease in body size. This change in encephaliz...
Yerkes researchers to present array of new data at Society for Neuroscience Meeting
... and rhesus macaques. This finding may explain how evolution
reinforced the protective systems human cells possess to minimize damage caused by metabolism, thereby allowing humans to live longer than nonhuman primates. (7 p.m. 8 p.m.) October 24, 2004 Each study is embargoed until the date and time of pre...
Humans and dolphins: If brain size is a measure, we're not that different
...reased significantly in two critical phases in the evolution
of these animals." The first brain size increase occurred with the origin of Odontocetes from the ancestral group Archaeoceti nearly 39 million years ago and was accompanied by a decrease in body size. This change occurred with the emergence o...
Darwin's greatest challenge tackled: the mystery of eye evolution
... light-sensitive cells in the brain. Only later in evolution
would such brain cells have relocated into an eye ...iary cells remained embedded in the brain. But the evolution
of the human eye is peculiar it is the ciliary cells that were recruited for vision which eventuall...
Findings challenge Darwinian theory
...earch challenges the classical Darwinian theory of evolution
as being the sole explanation for how new life for...s genetic variation, at least when it comes to the evolution
of asymmetric forms" Dr. Palmer said. He was able to synthesize published evidence showing that the ...
Rice biologists elected AAAS Fellows
... each selected for their pioneering efforts on the evolution
of sociality. AAAS, the world's largest general...eller joined Rice in 1984. He is interested in the evolution
of social interactions in contexts that involve cooperation, conflict, or both. He has studied wasps...
Who laid the first egg?
... big animals. This the very first moment of animal evolution
preserved in the fossil record." The research, "Animal Embryos from the terminal Neoproterozoic Doushantuo Formation: How did they hatch?," written by Xiao of Virginia Tech's College of Science, and Chuanming Zhou and Xunlai of the Nanjing Institute ...
Prominent physicist Freeman Dyson to speak at NJIT: Promises and perils of genetic engineering
...g and biotechnology change the course of Darwinian evolution
- drastically altering the nature of life on earth...umvent the Darwinian principles that have governed evolution
for three billion years. The result, he predicts, will be an explosion of biodiversity. Dyson will d...
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