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Tag: "evolution" at biology news

NHGRI Selects 13 More Organisms for Genome Sequencing

...als. Sequences that have been conserved throughout evolution often reveal important functional regions of the h...ng how such rearrangements have contributed to the evolution and speciation of humans and other non-human primates. To identify chromosomal rearrangements, resea...

Possible treatment found for 'chemobrain'

...als. Sequences that have been conserved throughout evolution often reveal important functional regions of the h...ng how such rearrangements have contributed to the evolution and speciation of humans and other non-human primates. To identify chromosomal rearrangements, resea...

Helping in a selfish world

...ate. Traditionally, scientists have explained the evolution of co-operation using the idea of kin selection. Help to relatives (who share your genes) makes sense if it means your relative will have more children who will carry your genes into the next generation. Therefore, relatives are expected to help more...

Visceral Leishmaniasis: Successful Vaccine Trial In Dogs

... Trypanosome pathogenesis » and 165 « Genetics and evolution of infectious diseases », in conjunction with the Institute of Medical Sciences, Banares Hindu University, Varanasi, India. ...

Virginia Tech, Nanjing Institute researchers discover half-billion year-old fossils

...e of Ediacara organisms that lived just before the evolution of familiar animals about 540-520 million years ago. ...

Gaining ground in the race against antibiotic resistance

... in the race -- reproducing in the lab the natural evolution of the bacterial enzymes that confer resistance. ... antibiotics, it took only a few days of test tube evolution to increase drug resistance. Eventually, they found four mutations in the evolved enzyme that allowe...

Evolution of life on Earth may hold key to finding life in outer space

...of groups in the nation working on the history and evolution of the core ribosomal machinery, Fox and his team of scientists focus on comparing the sequences and 3-D shapes of biological molecules. Their research benefits greatly from the many ongoing genome sequencing projects. "We do a lot of what is called...

Stressed cells spark DNA repair missteps and speed evolution

...e same gene or neighboring genes. "This can speed evolution of complex protein machines." Rosenberg said. ...

Retina adapts to seek the unexpected, ignore the commonplace

...dictive coding, a strategy shaped by the forces of evolution in adaptation to the average image structure of natural environments. "Yet animals encounter many environments with visual statistics different from this hypothetical 'average' scene," Meister says. "We have found that when this happens, the retina ...

Lactose intolerance linked to ancestral environment

...rnell. "This is a spectacular case of how cultural evolution -- in this case, the domestication of cattle -- has guided our biological evolution." Although all mammalian infants drink their mothers' milk, humans are the only mammals that drink milk as adults. But most people -- about 60 percent and primarily ...

North & South American researchers find architectural abnormalities in T. cruzi ribosome

...ibosome as a source of potential insights into the evolution of more complex organisms. "Ribosomes perform the translation of genetic information into protein in all organisms," Frank said. "The principle is always the same in plants, bacteria, and humans. It's a fundamental property of life on Earth." Anoth...

New technology shows our ancestors ate…everything!

...eaford, Ph.D., professor of functional anatomy and evolution at the Johns Hopkins School of Medicine. The new approach to studying dental microwear, the microscopic pits and scratches on the tooth surface caused by use, offers a more accurate measurement of the surface's appearance and is described in the Aug...

MBL researchers probe how an ancient microbe thrives and evolves without sex

...iversity, structural organization, and patterns of evolution of DNA transposons. The scientists found that DNA transposons in bdelloid rotifers are in a different, perhaps less damaging, location than those found in other creatures. Many bdelloid DNA transposons have the same surrounding sequences, which may ...

Human brain is still evolving

... that Microcephalin showed evidence of accelerated evolution along the entire primate lineage leading to humans...ion is whether the coincidence between the genetic evolution that we see and the cultural evolution of humans was causative, or did they synergize with each othe...

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

...ny rainforest outpost of Australia have driven the evolution of a new species in 8,000 years or less, according...gists claiming that it requires too many steps for evolution to get it right. "Some have argued that it's just too complicated and that it is not really necessa...

Grasshopper love songs give insight into sensory tuning

...cal technique could yield broader insight into the evolution of sensory circuitry. "Our approach presents a systematic way to uncover potential mismatches between the statistical properties of the natural environment and the coding strategy of sensory neurons. In turn, these discrepancies might improve our un...

On a wing and a prayer - Alaska researchers seek clues to bird flu

...hat could provide an unusual mixing ground for the evolution of new strains of bird flu - strains that could spread to lower latitudes and possibly jump to other species, including humans. University of Alaska (UAF) scientists and state and federal biologists from across Alaska have joined forces and formed t...

Prions rapidly 'remodel' good protein into bad, Brown study shows

...pports the theory that prions have endured through evolution because shape-shifting is advantageous, allowing cells to avoid stress by rapidly adjusting to a new environment. "Our studies provide some insight into how the appearance of a misfolded protein ?a rare event ?can lead to devastating neurological di...

Weapon performance determines mating success in the collared lizard

...ts on weapon performance, which in turn drives the evolution of weapon morphology. As such, the use of morphology as a proxy for performance and its presumed extensions to fitness should be based, whenever possible, on empirical morphologyperformance relationships. ...

Study hints at role of stem cell genes in testicular, breast cancers

...embryonic stem cells, and go through a multi-stage evolution in their structure and genetic activity before attaining their mature state. The study revealed that the genetic misregulation leading to seminomas begins very early in the formation of sperm-producing germ cells. Next, turning to cancerous tissue o...

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