Tag: "evolution" at biology news
Scientists identify genes responsible for 'black rot' disease in vegetables
...dings highlight the role of genome dynamics in the evolution
of pathogenicity in Xcc in response to different host species....
To stop evolution: New way of fighting antibiotic resistance demonstrated by Scripps scientists
...antibiotics. The scientists also show that E. coli evolution
could be halted in its tracks by subjecting the ba...omesberg, Ph.D., who led the study. Since the evolution
of resistance is under the control of LexA, compounds that block the protein might prolong the poten...
News tips: NASA presentations at Annual 2005 Joint Assembly Meeting
...er a few week period, and how their occurrence and evolution
is impacted by El Nino/Southern Oscillation and the Madden Julian Oscillation. Time/Location: Wednesday, May 25 at 9:45 a.m. EDT (8:45 a.m. local CDT), Room 220 Presenters: Siegfried Schubert, Y. Chang, Max J. Suarez, Philip J. Pegion, NASA GSFC. L...
New World founders small in number
...ry of that gene, but the stochastic nature of gene evolution
means that different genes have different histories. Hey analyzed DNA sequences from nine loci, so that the population genetic history could be found despite variation among genes. He also added an additional parameter to standard models to incorpora...
The evolutionary triumph of flower power
... for their appearance. With the proposed model of evolution
and adaptation to a human emotional niche, perhaps we have a clearer picture of our floral companions."...
Grasping metaphors: UC San Diego research ties brain area to figures of speech
...or center' of the human brain, we suggest that the evolution
of the dominant angular gyrus contributed enormously to the evolution
of many quintessentially human abilities, including metaphorical and other abstract thinking," Ram...
...tant starting point for dissecting of function and evolution
of small RNAs and their targets....
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 ...
Washington State University study points to role of toxins in inherited disease
...vironmental factors may play a much larger role in evolution
than has been realized before. This research was supported in part by a grant to Skinner from the U.S. Environmental Protection Agency's STAR Program....
Pathogens shape evolution of humans' most diverse genes
The great physical diversity that evolution
has forged in human beings is in evidence wherever we look, but the genes exhibiting the greatest diversity at the DNA level happen to function in a wholly invisible process: immunity. Genes encoding the Human Leukocyte Antigen (HLA) proteins are amo...
University of Chicago study overturns conventional theory in evolution
...owing that the percentage of mutations accepted in evolution
is also strongly swayed by the speed at which new ...phenomenon that challenges a paradigm of molecular evolution
that has been around for several decades," said lead author Bruce Lahn, Ph.D., assistant professor o...
NHGRI selects 13 new targets for large-scale sequencing program
...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...
Scientists see human kidney development through fruit fly eyes
... are like any other protein found in mammals. "The evolution
of these similar proteins in two very distantly related groups of organisms and for these similar purposes suggests that the two systems, the developing kidney and the developing fly eye, used these proteins to solve the same problem--the problem of ...
York scientists warn of dramatic impact of climate change on Africa
...because it works in a similar way to the effect of evolution
on chromosomes the programme combines different variables in lots of different ways and the bad fits are knocked out, leaving the best solutions." The York team collaborated with the Nees Institute for Biodiversity of Plants in Bonn and the South A...
Conservation International and SC Johnson partner again to offset carbon impacts
...otspots, Madagascar is a living example of species evolution
in isolation, evolving an exquisitely unique assemblage of species. The biodiversity hotspots are 34 regions worldwide where 75 percent of the planet's most threatened mammals, birds, and amphibians survive within habitat covering just 2.3 percent of...
Geneticists identify 'master switch' that causes female flies to behave like males
...ism, and are fundamentally important, why wouldn't evolution
build that circuitry the same way it builds other parts of organisms, like legs, eyes and wings?'' he says. Other behaviors-such as nesting, hibernation and nurturing-may be under the same type of genetic control, he concludes. Although the fruitless...
'Jumping genes' contribute to the uniqueness of individual brains
...which explains how they potentially play a role in evolution
by passing on new insertions to future generations. "But nobody has ever demonstrated mobility convincingly in cells other than germ line cells," says Gage. Apart from their activity in testis and ovaries, jumping L1 elements are not only unique to ...
Researchers track down cause of a disfiguring bone disorder
...en "conserved" from one organism to another during evolution
play a biological role, or they would have been discarded as organisms evolved. By introducing the conserved segments into cells similar to osteoblasts (bone-forming cells), the team found that a 250-base-pair conserved region named ECR5 was able to ...
Why being a teenage mum could be good for you!
...ought about by delayed reproduction occurs because evolution
has not been able to adapt to what is an artificia...to the 'mistiming' of reproduction may explain the evolution
of the loss of fertility with age."...
Tufts researchers shine light on firefly mysteries
... their sperm's competitive ability have led to the evolution
of chemicals produced by their reproductive glands. These chemicals kill the sperm of other males that have mated with the same female but they are also toxic to the female -- hence conflict." In a collaborative research effort with insect physiologi...
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