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Tag: "originated" at biology news

Caribbean frogs started with a single, ancient voyage on a raft from South America

...islands, including the coqui frogs of Puerto Rico, originated from a single frog species that rafted on a sea voyage from South America about 30-to-50-million years ago, according to DNA-sequence analyses led by a research group at Penn State, which will be published in the 12 June 2007 issue of the Proceedings...

Surprising origin of cell's internal highways

...ings around in order to hold its shape and divide, originated from a tiny structure near the nucleus, called the centrosome. Now, researchers at Vanderbilt University Medical Center reveal a surprising new origin for these cellular "highways." In the June issue of Developmental Cell, Irina Kaverina, Ph.D., an...

An ancient bathtub ring of mammoth fossils

...t most of the Ice Age floods in eastern Washington originated from glacial Lake Missoula. The lake formed behind...et, which echoes the distribution of boulders that originated from far away—so-called erratics—and rafted in on icebergs. The evidence suggests that these elevati...

Gene mutation linked to cognition is found only in humans

... the central nervous systems of humans and that it originated less than 5 million years ago. The study, which al...strates that type II is a human-specific form that originated relatively recently, less than 5 million years ago. Gene sequencing revealed a mutation specific ...

Spud origin controversy solved

...cientists hypothesized that landrace introductions originated in the Andes, others believed that the introductio...opean potato from Andean landraces yet it may have originated from Chile,?said Spooner. “If the true origin of the European potato was from Chile, rather from the...

First demonstration of new hair follicle generation in an animal model

...jury. Unexpectedly, the regenerated hair follicles originated from non-hair-follicle stem cells. “We’ve found that we can influence wound healing with wnts or other proteins that allow the skin to heal in a way that has less scarring and includes all the normal structures of the skin, such as hair follicles ...

Scientists discover new life in the Antarctic deep sea

...eat of ice led to an intermingling of species that originated in shallow and deep water habitats. Lead author Professor Angelika Brandt from the Zoological Institute and Zoological Museum, University Hamburg says, "The Antarctic deep sea is potentially the cradle of life of the global marine species. Our ...

Cornell lab confirms deadly fish virus spreading to new species

...since May 2006. Bowser suspects the virus may have originated from an infected marine fish off the Atlantic Coast and that the virus is still relatively new to the region. Other possible sources of the virus include the movement of infected fish by airborne or terrestrial predators, anglers using infected bait ...

Whiteflies and plant viruses can help each other to speed up biological invasion

...ccepted that the B whitefly is most likely to have originated from the Mediterranean/North Africa region, and its recent widespread invasion has been assisted by the worldwide flower trade. The question remains how this pest can increase so rapidly and displace native biotypes of whitefly after it has been tran...

UCI scientists reconstruct migration of avian flu virus

...ade. They found that multiple strains of the virus originated in the Chinese province of Guangdong, and they identified many of the migration routes through which the strains spread regionally and internationally. By knowing where H5N1 strains develop and migrate, health officials can better limit the spread o...

Type of stem cell found to reside in transplanted lungs

...e same sex, nearly all the MSCs (about 97 percent) originated in the donor, indicating that they were present in the tissue since the time of transplantation. "We were able to isolate the cells derived from the donor as far as 11,5 years after transplantation," says Lama, assistant professor in the Division of ...

The chimpanzee stone age

...e authors suggest this type of tool use could have originated with our common ancestor, instead of arising independently among hominins and chimpanzees or through imitation of humans by chimpanzees. This study confirmed that chimpanzees and human ancestors share for thousands of years several cultural attrib...

Hofmeyr skull supports the 'Out of Africa' theory

... of genetic evidence indicating that modern humans originated in sub-Saharan Africa and migrated about this time to colonize the Old World. (Science January 12, 2007) "The Hofmeyr skull gives us the first insights into the morphology of such a sub-Saharan African population, which means the most recent commo...

Neural bottleneck found that thwarts multi-tasking

... particular sensory or motor modality, but instead originated at a central information-processing bottleneck. The results revealed that the central bottleneck was caused by the inability of the lateral frontal and prefrontal cortex, and also the superior frontal cortex, to process the two tasks at once. Both...

A healthier start to a pig's life

... problems." The idea for the Suilektin® product originated in Lund University but was developed in collaboration with other project partners in Poland. Gramineer International in Sweden produced and purified the lectin, and Lund University tested it in laboratory studies. The Institute of Physiology and Nutr...

E. coli bacteria migrating between humans, chimps in Ugandan park

...he antibiotic-resistant bacteria in chimps clearly originated in humans. Goldberg said it was not clear whether the exchange of bacteria was the result of direct or indirect (environmental) association between the chimps and humans working in the park. Both make use of local streams and other environmental f...

Light-based probe 'sees' early cancers in first tests on human tissue

...uses a patient's death, but that cancer might have originated in the colon or other site of epithelial tissue," said Adam Wax, professor of biomedical engineering. "Being able to detect pre-cancer in epithelial tissues would therefore help prevent all types of cancer by catching it early, before it has a chance...

'Failed' experiment yields a biocontrol agent that doesn't trigger antibiotic resistance

...rful, long-reaching impact - all from an idea that originated in a failed experiment. ...

Sea urchin genome suprisingly similar to man and may hold key to cures

... Sea urchins are echinoderms, marine animals that originated more than 540 million years ago. The reason for the great interest in sequencing the sea urchin genome is because it shares a common ancestor with humans. Sea urchins are closer to human and vertebrates from an evolutionary perspective than other mor...

Two studies on bee evolution reveal surprises

...m the family Colletidae, which implies that bees originated in the Southern Hemisphere (either South America or Australia). However, the work of Danforth and his group suggests that the earliest branches of the bee's evolutionary tree originate from the family Melittidae. That would mean that bees have an A...

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