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Tag: "split" at biology news

Cricket's finicky mating behavior boosts biodiversity

...hat 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...

Retrovirus struck ancestors of chimpanzees and gorillas millions of years ago, but did not affect ancestral humans

...nome scientists. The virus struck after humans had split off the evolutionary tree from primates, researche...ell after the separation of humans from apes. That split is estimated to have occurred five to seven million years ago. During that period, ancestral humans ...

Revueltosaurus skeleton unearthed at Petrified Forest upsets dinosaur tale

...inosaurs of the Cretaceous, while the saurischians split into the sauropodomorphs - the long-necked browsers like Brachiosaurus - and the carnivorous theropods, like T. rex. Only the theropods survive to the present as birds. If, as the team concludes, the first ornithischians outside South America did no...

Agilent Technologies introduces high-capacity human protein removal system for proteomics research

...inosaurs of the Cretaceous, while the saurischians split into the sauropodomorphs - the long-necked browsers like Brachiosaurus - and the carnivorous theropods, like T. rex. Only the theropods survive to the present as birds. If, as the team concludes, the first ornithischians outside South America did no...

Big differences in duplicated DNA distinguish chimp and human genomes

...s of both chimps and humans, and after the species split off from each other, that segment was duplicated many times in the human genome over millions of years. Most of the remaining one-third of duplication differences are due to deletion of segments in one of the two species - the segment is deleted from...

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 reali...

The roots of civilization trace back to ... roots

...eat roots that may have contributed to the initial split between humans and the other apes. Laden and Wrangham's paper is available at www.sciencedirect.com ...

“Hitchhiking?Viruses as Cancer Drug Delivery System

...eat roots that may have contributed to the initial split between humans and the other apes. Laden and Wrangham's paper is available at www.sciencedirect.com ...

Plants discriminate between self and non self

... used plants that had two roots and two shoots and split them into two separate plants that were genetically identical, but physiologically separated. The plants acted as if their separated twin was a non-self plant, even though genetically it was identical. "This eliminated the possibility that the mechan...

Prozac for future Plants on Mars

... used plants that had two roots and two shoots and split them into two separate plants that were genetically identical, but physiologically separated. The plants acted as if their separated twin was a non-self plant, even though genetically it was identical. "This eliminated the possibility that the mechan...

Picky female frogs drive evolution of new species in less than 8,000 years

...in this "dinky bit of rainforest in Australia" has split many species, and that reinforcement at zones of recontact may be generating other new species. "In this tropical system, we have had long periods of isolation between populations, and each one, when they come back together, have got a separate evol...

Gene therapy works in mice to prevent blindness that strikes boys

...lts. What happens is the retina actually begins to split in the middle, causing loss of central vision - that's the vision that you need to be able to read or walk around." Scientists say the gene transfer method eventually could be applied to many eye diseases caused by single gene defects, including a h...

New discovery: If it weren't for this enzyme, decomposing pesticide would take millennia

...hat grows in the soil of potato fields can -- in a split second -- break down residues of a common powerful pesticide used for killing worms on potatoes, researchers have found. That may be expensive for farmers but lucky for the environment because University of North Carolina at Chapel Hill scientists h...

Mammalian Transcriptome Mapped

.... In normal DNA transcription, the two strands are split apart, and only the sense strand is copied. The other DNA strand, the "antisense" strand, can also be transcribed into RNA. Antisense transcription is the "reverse" expression of genomic DNA. If the same molecule of DNA is transcribed into antisense ...

Center releases new public survey on stem cells

...d-line opponents of embryonic stem cell studies -- split evenly on approval for embryonic stem cell research. Respondents were given a choice of four ESC research policy options: banning all embryonic stem cell research, retaining the current Bush administration policy, relaxing restrictions along the li...

Newly discovered birdlike dinosaur is oldest raptor ever found in South America

...gaea. During the Middle and Late Jurassic, Pangaea split into two landmasses. Laurasia, composed of North America, Asia and Europe, drifted to the north; Gondwana, composed of the southern hemisphere continents plus India, drifted to the south. Until recently, dromaeosaurs (swift-running, bi-pedal, birdl...

Wild Gorillas Handy with a Stick

...ed for tool use evolved before the gorilla lineage split off from humans and the other great apes—providing further evidence that intelligence is not unique to humans. ...

Scientists narrow the time limits for the human and chimpanzee split

...nn State Universities have placed the time of this split between 5 and 7 million years ago -- a sharper foc..., the calibration time the scientists used was the split of Old World monkeys -- including baboons, macaques, and others -- from the branch of the phylogenet...

Why the Amazon rainforest is so rich in species

...imilar between any pair of species, they must have split recently. If the DNA has diverged a great deal bet...piece of the biodiversity puzzle in place. Species split at very different rates, and their extinction or transformation is mostly determined by the ecology ...

Marsupial genome reveals insights into mammalian evolution

...conserved for long periods of time. The monotremes split off from other mammals 210 million years ago. The remaining marsupials split from the main (placental) group about 180 years ago." Significantly, the authors also found data su...

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