Quantcast

Latest Natural selection Stories

883d1b4c10086e8fe50bb12bdd65e6cc
2010-02-02 07:12:41

Research findings introduce fundamental shift in how biologists perceive relationship between evolution and ecology Biologists have known for long that ecology, the interaction between organisms and their environment, plays a significant role in forming new species and in modifying living ones. The traditional view is that ecology shapes evolution. The environment defines a template and the process of evolution by natural selection shapes organisms to fit that template. Some specialized...

6e74a3f7608bbaacc0fcee35cb270f1d1
2010-01-14 12:15:48

Genes are being tested for roles in most conspicuous variations among dogs From the Dachshund's stubby legs to the Shar-Pei's wrinkly skin, breeding for certain characteristics has left its mark on the dog genome. Researchers have identified 155 regions on the canine genome that appear to have been influenced by selective breeding. With more than 400 distinct breeds, dogs come in a wide range of shapes, sizes, fur-styles, and temperaments. The curly-haired toy poodle, small enough to sit in a...

2010-01-11 13:12:07

Scientists call for integrating evolutionary perspectives into medical curricula The subtle but ongoing pressures of human evolution could explain the seeming rise of disorders such as autism, autoimmune diseases, and reproductive cancers, researchers write in the Proceedings of the National Academy of Sciences. Certain adaptations that once benefited humans may now be helping such ailments persist in spite of "“ or perhaps because of "“ advancements in modern culture and...

2010-01-08 12:38:13

Researchers devise method to pinpoint key genetic variations under positive natural selection that may impact human health Fossils may provide tantalizing clues to human history but they also lack some vital information, such as revealing which pieces of human DNA have been favored by evolution because they confer beneficial traits "” resistance to infection or the ability to digest milk, for example. These signs can only be revealed through genetic studies of modern humans and other...

934c775630d0a7d740fb90bcda5273b01
2009-12-30 09:25:00

Does it matter if nature solves the same problem multiple ways? A NSF-supported study of lizard populations in White Sands, New Mexico has helped researcher Erica Rosenblum of the University of Idaho begin to answer that question. Published December 28 in the Proceedings of the National Academy of Sciences, the article describes genetic differences between lizards found in habitats that contain white or dark soils. These stark differences in color are an ideal environment to study natural...

2009-11-26 14:26:59

Is speciation adaptive? Darwin suggested that the action of natural selection can produce new species, but 150 years after the publication of his famous book, 'On the Origin of Species', debate still continues on the mechanisms of speciation. New research finds sexual selection to greatly enlarge the scope for adaptive speciation by triggering a positive feedback between mate choice and ecological diversification that can eventually eliminate gene flow between species. By means of a...

364c2ff82b22776934fe5ac64a2c1b461
2009-11-21 09:03:03

Honoring 150 years of "On the Origin of Species;" Noor is recipient of Darwin-Wallace Medal Please join the National Science Foundation (NSF) on Monday, Nov. 23, at 10 a.m. ET for a live webcast featuring Darwin-Wallace Medal recipient Mohamed Noor of Duke University, who will answer media questions about current evidence for evolution and modern evolution theory. Among the topics: * Does modern genetic evidence favor the existence of a missing link? * What's the single most important...

2009-11-09 06:35:00

LACEY, Wash., Nov. 9 /PRNewswire/ -- The evolution controversy rages hot as ever, with aggressive initiatives from popular secular scientists and best-selling authors like Sam Harris and Richard Dawkins in fighting deep-seated religious beliefs of Creationism and Intelligent Design. But according to Lawrence Wood, author of "Evolution's Fatal Flaw: The Inevitable Consequence of the Need to Ensure Species Survival" (published by iUniverse), evolutionists have failed to address evolution's...

2009-11-03 11:50:00

Researchers at the University of Pennsylvania have developed a theoretical model that informs the understanding of evolution and determines how quickly an organism will evolve using a catalogue of "evolutionary speed limits." The model provides quantitative predictions for the speed of evolution on various "fitness landscapes," the dynamic and varied conditions under which bacteria, viruses and even humans adapt. A major conclusion of the work is that for some organisms, possibly including...

74e555b87ed1e04f1c4f272112ccf4951
2009-10-29 05:50:00

Evolutionary outcomes can be influenced by culture as well as genes, according to a new study released on Wednesday comparing societies around the world. Natural and social sciences are rarely brought together, but the study analyzed the interaction across 29 countries of two sets of data, genetic and cultural. The researchers discovered that the majority of people living in countries considered to be collectivist have a certain mutation within a gene that regulates the transport of...


Word of the Day
snash
  • To talk saucily.
  • Insolent, opprobrious language; impertinent abuse.
This word is Scots in origin and probably imitative.