Tag: "split" at biology news
Founding fathers & mothers: How many crossed the land bridge?
...models of population divergence where a group has split
off from its ancestral population to pursue its own destiny. In a paper appearing in the June 2005 issue of PLoS (Public Library of Science) Biology, Hey disclosed his findings. "The estimated effective size of the founding population for the New Wo...
Discovery of an American salamander where it shouldn't be: Korea
...ween Italy and British Columbia, Wake said, and it split
off from the aquatic salamanders common in Korea at least 175 million years ago. "In the past, we have seen this one group that occurs in Sardinia and Italy as being somehow a special case, an enigmatic case," he said. "Now all of a sudden, we realiz...
DNA solves mystery of Gibraltar's macaques
...ies. The research also indicated that the initial split
between two main subgroups of M. sylvanus occurred about 1.6 million years ago. The other co-authors of the study are Lara Modolo at the Anthropological Institute of the University of Zurich in Switzerland, who conducted all of the laboratory work on...
Two-part blood pressure control suggests new approach to hypertension therapy
...dence that the job of blood pressure regulation is split
into two parts that controlled by the kidneys and that controlled by other systems throughout the body," said Thomas Coffman, M.D., chief of nephrology at Duke University Medical Center and the Durham VA Medical Center and lead author of the study. ...
Pay up, you're being watched
... but only if others donated too. The researchers split
the group into two. Half made their choices undisturbed at a computer screen, while the others were faced with a photo of Kismet- ostensibly not part of the experiment. The players who gazed at the cute robot gave 30 per cent more to the pot than the...
X-chromosome tells the tale
...f the X and Y chromosomes have evolved. Before the split
between birds and mammals, the X and Y chromosomes were just like any other pair of chromosomes each was fairly similar and carried similar information. The authors, in tracing the evolution of the X chromosome, showed that slowly, but surely, the ...
Linking brain to mind in a common genetic disease
...ir verbal skills. New research sheds light on this split
in abilities by investigating how differences in brain structures may influence how the mind works. Researchers at The Children's Hospital of Philadelphia, studying a common chromosome disorder, have used high-tech imaging tools to identify abnormal...
New dinosaur raptor found; First in Southern Hemisphere
...rcontinents -- one called Laurasia that eventually split
into Europe, Asia, and North America, and another ...r probably roamed both supercontinents before they split
apart from an even larger land mass, Pangea -- some 150 million years ago, during the late Jurassic ...
An evolutionary road less traveled
...fter speakers of a related language, probably Tin, split
off and came into contact with another, as yet unknown language, an event that likely happened less than 1,000 years ago. The genetic and linguistic evidence indicates that the Mlabri were "founded" between 500 to 1,000 years ago by one female and ...
Prehistoric jawbone reveals evolution repeating itself
...e evolutionary lines of living mammals after their split
from a common ancestor some 200 million years ago...., even though 115 million years ago monotremes had split
off on their own evolutionary line from the marsupials and placentals." How can this supposedly rare...
Time to rewrite the species rulebook, MSU scientists say
...le-stranded molecule. When a given DNA molecule is split
in two, for instance by heating it up, its two strands will spontaneously find each other, or reassociate, when the temperature drops. Scientists have long exploited this fact in their rough rule-of-thumb approach for saying just what makes up a spe...
New stem cell source could boost bone marrow success
... To harvest the HUCPV cells, Davies and his team split
open umbilical cords and pulled out the blood vessels with their surrounding Wharton's Jelly. (All the cords come from consenting full-term patients.) The vessels were sutured closed and suspended in collagenase, an enzyme that breaks down the Wharto...
Cricket's finicky mating behavior boosts biodiversity
...that impregnate the female. As a species begins to split
into two separate species, says Mendelson, "the so...me," says Mendelson, "lineages - species that have split
- cease to recognize each other as mates. Although the ancestors recognized each other as mates, the...
Marsh-dwelling mole gives new meaning to the term 'fast food'
...conds to determine whether it is edible. Given the split
millisecond timing involved, it is not surprising that the moles frequently make mistakes. In a series of trials where the researchers set out worm sushi, they found that the moles started to move in the wrong direction and had to suddenly reverse th...
Recognizing new aneurysm syndrome can save lives
... that people with wide-set eyes, a cleft palate or split
uvula (the tissue that hangs down in the back of t...ctor to look in her mouth and tell me if she had a split
uvula. The answer was yes. We found that the girl's aorta was already approaching 4 centimeters, so ...
Scientists find missing link between whale and its closest relative, the hippo
...cestor 50 to 60 million years ago that evolved and split
into two groups: the early cetaceans, which eventually spurned land altogether and became totally aquatic; and a large and diverse group of four-legged beasts called anthracotheres. The pig-like anthracotheres, which blossomed over a 40-million-year ...
Anthropologists find 4.5 million-year-old hominid fossils in Ethiopia
...-- that is, human ancestors who lived just after a split
with the lineage that produced modern chimpanzees. Despite the millions of years that separate us, modern humans have a few things in common with A. ramidus. Fossils from Gona and elsewhere suggest that the ancient hominid walked on two feet and had...
B-15A iceberg's close encounter monitored by Envisat
...15A (the current B-15A having inherited its name), split
asunder by storms and currents while run aground on Ross Island, as observed by repeated ASAR observations. The animation ends with a combined MERIS/ASAR panorama across Victoria Land, including a view of the the Erebus ice tongue, similar to B-15A's...
Scientists develop split green for tagging protein
...w system, which uses GFP fragments instead. The split
green fluorescent protein research resulted from Laboratory scientists efforts to develop a practical method for engineering protein folding and solubility as part of the National Institutes of Health (NIH) Protein Structure Initiative, a large-scale...
University of Chicago researchers discovered that humans are a 'privileged' evolutionary lineage
...es (an Old World monkey), rats and mice. (Primates split
from rodents about 80 million years ago; humans split
from macaques 20 million to 25 million years ago; and rats split
from mice 16 million to 23 million ...
1 2 3 4 5 6 7 8