Tag: "evolve" at biology news

Laboratory test of evolutionary theory confirms importance of links between populations

...eographic mosaics of species interactions that can evolve differently in different locations. "We have a pre...uced to a population of E. coli, the bacteria soon evolve resistance to the virus. The virus, in turn, evolves to attack the resistant bacteria, and then the ...

For inferring the biological tree of life, simple is better

...istic process in which the various parts of a gene evolve at the same rate in all species. So they evaluate... with experimental studies to understand how genes evolve new functions. He is particularly interested in the evolution of hormones and the receptor proteins...

Insects implicated in the evolution of new human infectious diseases

... are currently harmless to humans, but which could evolve quickly into a range of new diseases. As part of their research, Dr Nick Waterfield and Professor Richard ffrench-Constant (correct) from the University of Bath, and Professor Brendan Wren, from the London School of Hygiene and Tropical Medicine, are...

Findings challenge Darwinian theory

...dinner plate inherit its big crusher clawor did it evolve through need, without the help of genes? Genetics aren't the only triggers for the traits a species develops, according to findings from a University of Alberta professor. The research challenges the classical Darwinian theory of evolution as being...

Structure of new DNA enzyme family member found

...archers, who are trying to understand how proteins evolve and function by looking at their structural featur...ght be a common ancestor or whether proteins might evolve using similar kinds of rules that whole organisms use to evolve," Ealick reasons. In fact, his group...

Sexual competition drives evolution of a sex-related gene

...ed that male reproductive genes in general tend to evolve more rapidly than other genes, "this study extends those observations to a more quantitative level, showing that the rate of evolution actually correlates with how intense the sexual selection is."...

High-predator environment has unexpected impact on aging in fish

... external factors, like disease or predation, will evolve to deteriorate more rapidly as they get older. Their predictions have been widely accepted and are supported by some experiments. Now, a study by UC Riverside researchers comparing fish living in high- and low-predator environments has found that the...

Genome of ancient fish could reveal evolutionary mysteries, Stanford scientists say

... Although it isn't known why coelacanths evolve so slowly, Noonan suggested that their lifespan might be at issue. Where most fish reproduce quickly and have short generation times, the coelacanth reproduces slowly and gives birth to live young. This means that the coelacanth has had fewer generat...

Linking empires, economics, evolution

...entirely by touch. His work on how shelled animals evolve to resist predators or attack their prey led him initially to questions about the "arms race" between groups of humans, and then to a wider perspective on how societies change and grow. "Whether our field is natural history, human history, evolu...

How running made us human

...Homo with its "radically transformed body" did not evolve for another 3 million or more years Homo habilis, Homo erectus and, finally, our species, Homo sapiens so the ability to walk cannot explain anatomy of the modern human body, Bramble says. "There were 2.5 million to 3 million years of bipedal wal...

A puzzle posed by black-headed ducks yields to persistent biologists

...t expect there to be much pressure on the hosts to evolve defenses against this kind of parasitism," said Br...pparently, the ducks have been unable to gradually evolve egg mimicry because their hosts are already attuned to detecting eggs laid by other birds of their o...

Not finding life? Dig deeper.

...I am interested in how these microbial communities evolve and respond. Can we discover new microbial activities in such extreme environments? Are those activities something we can exploit?" The team's findings suggest that how researchers look for life on Mars may affect whether life is found on...

Study in Royal Society journal on possible genetic factors in social responsiblity

...owth. A critical assumption is that the sequences evolve in a neutral fashion, unaffected by natural selection. Here, mitochondrial DNA sequences from tits of the genus Parus were tested for signatures of natural selection. Although there appears to be some selection on these sequences, it is insufficient...

Study in Royal Society journal on first evidence for magnetic field detection in sharks

...cas and Dr R Atlas How traits that benefit others evolve has been a perennial mystery for evolutionary biology. We chose antibiotic resistance as a test case for looking at the evolution of group-beneficial traits. We constructed strains of bacteria that secrete an enzyme into their environment that breaks...

Cells don festive holiday colors

...y for generating antibody diversity and used it to evolve a new red fluorescent protein. In addition to offering fluorescent proteins in a range of distinctive colors, Tsien's group has improved their design, creating proteins that are "monomers" that consist of only single protein units. Fluorescent prote...

Immune system contributes to evolution of a new fluorescent protein

...hers have "hijacked" that machinery and used it to evolve a new type of fluorescent protein. The mutation pr...apeutics. For example, the researchers used SHM to evolve a red fluorescent protein - which is used to track molecules inside cells - with improved stability ...

Scientists reveal molecular secrets of the malaria parasite

... expression studies to trace how malaria parasites evolve on a molecular level as they move between their ho...highlights the genes in four malarial species that evolve rapidly because of "selective pressures" in the stages of their life cycles in their mosquito vector...

UBC prof's research challenges prevailing theory of how new species evolve

... theory among evolutionary biologists that species evolve only when separated by a geographical barrier. The findings, published in the January 21 issue of Science magazine, have broad implications for preserving biological diversity and endangered species, says Irwin. "The process for how one species evolv...

Lack of potential mates has lead to 'sloppy' gene control and risk of disease for humans

...minids, the two legged primates that were to later evolve into both humans and chimpanzees. Had there been more early Hominids, and hence a greater choice of mates, most of these mutations would have been overridden by natural selection from a larger pool of available DNA. This contrasts dramatically with ...

Theory on evolution of essential genes is overturned by new finding

...ew functions - including essential functions - can evolve at any time. The researchers made the discovery as part of a project to produce the first molecular genetic characterisation of a paternal effect gene. Paternal effect genes are important because without them a fertilised egg cannot develop into an a...

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