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Last updated on April 17, 2014 at 15:58 EDT

Latest Natural selection Stories

Europeans' Appearance Altered Over Five Millennia Of Natural Selection
2014-03-12 05:27:21

April Flowers for redOrbit.com - Your Universe Online A great deal of research has been focused on the factors that have influenced the human genome since the end of the last Ice Age. An international team of scientists—including anthropologists at Johannes Gutenberg University Mainz (JGU), geneticists at University College London (UCL), and archaeologists from Berlin and Kiev—has analyzed ancient DNA from skeletons, finding that natural selection has had a major effect on the human...

Unraveling The Hidden Variation Of Bacteria
2014-03-07 13:02:27

Instituto Gulbenkian de Ciencia This news release is available in Portuguese. Our intestines harbor an astronomical number of bacteria, around 100 times the number of cells in our body, known as the gut microbiota. These bacteria belong to thousands of species that co-exist, interact with each other and are key to our health. While it is clear that species imbalances may result in disease, it is unclear at what pace does each species in the gut evolves, a process that contributes to the...

2014-03-04 23:27:34

The Life, Earth & Health Sciences Magazine EurekaMag.com has published 747 new articles on evolutionary genetics. As a comprehensive publisher of biological and evolutionary articles, EurekaMag.com coverage includes this biological integration of Darwinian evolution with several branches of biology including genetics, cytology, systematics, botany, morphology, ecology and paleontology. Mannheim, Germany (PRWEB) March 04, 2014 EurekaMag.com has newly published 747 new articles on...

Infidelity Linked To Large Testicles
2014-01-29 10:15:23

Yngve Vogt  - University of Oslo “We can be grateful to parasites, bacteria and viruses for our ability to have sex. Even though sexual reproduction is far less efficient than non-sexual, nearly all living organisms that you can observe in your environment are based on sexual reproduction. The most important function of sex is to reshuffle the genes in each mating. In this way, the immune system develops resistance to parasites, bacteria and viruses,” explains Petter Bøckman,...

Engineering Plus Evolutionary Analyses Used To Answer Natural Selection Questions
2014-01-24 14:45:08

University of Massachusetts at Amherst Introducing a new approach that combines evolutionary and engineering analyses to identify the targets of natural selection, researchers report in the current issue of Evolution that the new tool opens a way of discovering evidence for selection for biomechanical function in very diverse organisms and of reconstructing skull shapes in long-extinct ancestral species. Evolutionary biologist Elizabeth Dumont and mechanical engineer Ian Grosse at the...

Blind Cavefish Offer Evidence For Long-debated Mechanism Of Evolutionary Change
2013-12-13 11:16:07

Marine Biological Laboratory In a blind fish that dwells in deep, dark Mexican caves, scientists have found evidence for a long-debated mechanism of evolutionary change that is distinct from natural selection of spontaneously arising mutations, as reported this week in the journal Science. The eyeless cavefish Astyanas mexicanus is "a special system in which we can look at evolution in action," says article co-author William Jeffery, a senior adjunct scientist at the Marine Biological...

Natural Selection Shown To Promote Antigenic Evolvability
2013-11-17 04:46:48

Ranjini Raghunath for redOrbit.com - Your Universe Online What is more useful? Having a superpower, or the ability to develop a superpower? Evolution, of course, picks the latter. Evolution favors the survival of the fittest. If a trait helps an organism adapt to a changing environment, that trait is favored and preserved by evolution. For example, when insects are affected by a pesticide, some of them develop resistance to it, while others die. Evolution targets these...

Two Mouths For One Worm
2013-11-07 11:58:54

Max-Planck-Gesellschaft A devious evolutionary path between genetics and environment Depending on the environment in which the worm grows, the larva of the roundworm Pristionchus pacificus develops into either a wide-mouthed predator or a narrow-mouthed bacteria eater. A team of researchers at the Max Planck Institute for Evolutionary Biology in Tübingen, Germany, headed by Ralf J. Sommer have now discovered a developmental biological switch that determines the worm's mouth form....

Butterflies Offer Insights Into Evolution
2013-10-31 16:39:31

Michael Harper for redOrbit.com - Your Universe Online A new study from the University of Chicago finds it’s genetically easier to spin off into a new species than it may have once been thought, even if the two species remain close and interbreed with one another. After studying butterflies, the researchers found evolution can happen as the result of a process rather than a single event. In fact, in the case of butterflies, the beginning of a new species could begin with something as...

2013-09-18 15:43:41

Saving energy is important for humans and animals alike when resources are limited. Scientists at the Research Institute of Wildlife Ecology of the University of Veterinary Medicine, Vienna, found out that although higher-ranked red deer gain privileged access to patches of food, they also have higher metabolic rates and thus use more energy. This can be a serious disadvantage in winter when red deer rely largely on their limited stored body fat to survive. Energy budget adjustments...