News tagged with organic evolution
Could a newly discovered viral genome change what we thought we knew about virus evolution?
A study published in BioMed Central's Biology Direct journal reports the existence of a previously undetected group of viruses and, more importantly, a new type of viral genome that could have huge implications for theori ...
Apr 18, 2012 |
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New study sheds light on reasons behind genomes differences between species
A study led by Lluis Ribas de Pouplana, researcher at the Institute for Research in Biomedicine, gives an explanation for the divergent evolution of the genomes of different groups of species. The connection ...
Mar 29, 2012 |
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Oldest organism with skeleton discovered in Australia
A team of paleontologists has discovered the oldest animal with a skeleton. Called Coronacollina acula, the organism is between 560 million and 550 million years old, which places it in the Ediacaran period ...
Other Sciences / Archaeology & Fossils
Mar 08, 2012 |
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Explosive evolution need not follow mass extinctions, says study of ancient zooplankton
Following one of Earth's five greatest mass extinctions, tiny marine organisms called graptoloids did not begin to rapidly develop new physical traits until about 2 million years after competing species became ...
Feb 13, 2012 |
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Examining evolution from a cellular perspective
The evolutionary processes of unicellular and multicellular organisms are continually under debate. John Torday, Ph.D., a lead investigator at Los Angeles Biomedical Research Institute (LA BioMed), has recently co-authored ...
Jan 25, 2012 |
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Genetic study of black chickens shed light on mechanisms causing rapid evolution in domestic animals
The genetic changes underlying the evolution of new species are still poorly understood. For instance, we know little about critical changes that have happened during human evolution. Genetic studies in domestic animals can ...
Dec 22, 2011 |
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Evolution keeps sex determination flexible
There are many old wives' tales about what determines a baby's sex, yet it is the tight controls at the gene level that determine an organism's sex in most species. Researchers at Michigan State University have found that ...
Sep 12, 2011 |
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Scientists offer way to address 'age-old' questions
Scientists have devised a method to measure the impact of age on the growth rates of cellular populations, a development that offers new ways to understand and model the growth of bacteria, and could provide new insights ...
Sep 07, 2011 |
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Modified genetic alphabet: Chemical evolution generates bacterial strain with artificial nucleotide in its genome
(PhysOrg.com) -- Evolution is based on heredity, changes to the genetic material (mutation), and the natural selection of those organisms that are best suited to the given environmental conditions. An international ...
Jul 19, 2011 |
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Team makes discoveries about major event in history of complex life
(PhysOrg.com) -- A team of scientists led by Montana State University has discovered the "when" of a major event that led to the evolution of complex life on Earth.
Space & Earth / Earth Sciences
Jun 21, 2011 |
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Mutations: When benefits level off
Beneficial mutations within a bacterial population accumulate during evolution, but performance tends to reach a plateau. Consequently, theoretical evolutionary models need to take into account a "braking effect" in expected ...
Jun 08, 2011 |
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Errors in protein structure sparked evolution of biological complexity
Over four billion years of evolution, plants and animals grew far more complex than their single-celled ancestors. But a new comparison of proteins shared across species finds that complex organisms, including humans, have ...
May 18, 2011 |
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Accelerated lab evolution of biomolecules could yield new generation of medicines
Scientists at Harvard University have harnessed the prowess of fast-replicating bacterial viruses, also known as phages, to accelerate the evolution of biomolecules in the laboratory. The work, reported this week in the journal ...
Apr 10, 2011 |
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Living dinosaurs: The evolutionary history of modern birds
"Even the wide interval between birds and reptiles has been shown by the naturalist to be partially bridged over in the most unexpected manner, on the one hand, by the ostrich and extinct Archeopteryx, and on the other hand, ...
Other Sciences / Archaeology & Fossils
Apr 05, 2011 |
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Some outcomes of the evolutionary race buck conventional wisdom (w/ video)
In some cases, less fit organisms may out-survive their in-shape counterparts, according to a study reported in the March 18 issue of Science. The finding surprised researchers who assumed less fit organi ...
Mar 24, 2011 |
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