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Tag: "evolves" at biology news

Reconstructing the biology of extinct species: A new approach

...f locomotion produced by its limbs. "If an animal evolves a new way of moving about the world, its organ of balance must evolve accordingly," Walker explains. From the visual information, the animal tracks its position relative to stationary objects such as tree trunks, branches, rocks or cliffs, or the gr...

Extra-aggressive form of idiopathic pulmonary fibrosis identified

...he insidious onset of dyspnea or cough and usually evolves slowly. Now, Selman and coworkers present in an article published in the online, open-access journal PLoS ONE on Wednesday 30th May, strong evidence indicating that a subset of IPF patients has a short duration of symptoms before diagnosis and d...

Cancer scientists create 'human' leukemia process to map how disease begins, progresses

...ls within which the disease arises and then how it evolves and progresses, all within the context of human cells. "So what we are building is a new approach and way of studying how leukemia arises in the first place. We found that with the leukemia gene we were using, the disease only arose from immatur...

Parental genes do what's best for baby

...aller young are born. “The idea that imprinting evolves because of conflict between males and females over maternal investment in their offspring has become a generally accepted truth that has remained largely unchallenged,?said Dr Wolf. “But we have shown that selection for positive interactions betwe...

Control measures fail to stop spread of new H5N1 virus

...spread further through Asia and into Europe, as it evolves to form other sublineages that vary from place to place. This evolution into different sublineages also occurred during the previous two waves of H5N1 transmission that occurred during the past several years, according to the investigators. A report ...

Viral genetic differences are possible key to HIV dementia

...'s most likely to vary between tissues, because it evolves rapidly and allows the virus to dock with different cell types," Pillai says. According to Pillai, an analysis of the sequence data suggests that HIV is "genetically compartmentalized" between the central nervous system (CNS) and the blood, "which...

Finding a virus is not all bad news

...ogether with a mathematical model of how the virus evolves this information was used to estimate the cougar's population size, the changes in the population over time, rate of evolution and rate of movement. "This new technique of analysing the genetic data from a virus in an animal rather than the animal's...

Evolutionary shifts in olfactory sensitivities in fruit flies

How do an animal's senses change as it evolves to occupy a new ecological niche? By comparing the olfactory system of the fruit fly Drosophila melanogaster, which feeds from multiple fruit types, with that of its sibling species D. sechellia, a specialist particularly drawn to a single fruit type...

Study outlines genetic differences between potential pandemic influenza strains

...y constant. Only time will tell whether the virus evolves or mutates in such a way that it can be transmitted from human to human efficiently," says Garten. ...

Study finds evolution doesn't always favor bigger animals

... "Scientists have been interested in how body size evolves for a long time, but there is a lot of uncertainty about what factors are most important in determining whether animals get bigger or smaller over time," added Hunt, now a curator at the National Museum of Natural History in Washington, DC. The two...

Warbling whales speak a language all their own

...ating season. Thought to attract females, the song evolves over time. Suzuki and co-authors John Buck and Peter Tyack applied the tools of information theory--a mathematical study of data encoding and transmission--to analyze the complex patterns of moans, cries, and chirps in the whales' songs for clues t...

Genetic analysis of cavefish reveals more about evolution

...the evolutionary process by examining how albinism evolves in cavefish. Researchers, including New York University Biology Professor Richard Borowsky, examined two populations of Mexican cavefish and found that albinism in both populations was linked to Oca2--a pigmentation gene also responsible for the mos...

Researchers make gains in understanding antibiotic resistance

...of how the drugs' main cellular target in bacteria evolves to become resistant to some of these medications. The findings are already leading to new experimental antibiotics that are being engineered to circumvent resistance, which is a major worldwide health problem. Led by Thomas A. Steitz, a Howard Hughe...

Octopuses occasionally stroll around on two arms, UC Berkeley biologists report

...ll these different locations." Because this trait evolves so rapidly after ocean fish colonize new environments, he added, "we wondered whether the genetic variant (the mutant gene) that controls this trait might still exist in the ocean fish. So we collected large numbers of ocean fish with complete armor,...

Researchers trace evolution to relatively simple genetic changes

...ll these different locations." Because this trait evolves so rapidly after ocean fish colonize new environments, he added, "we wondered whether the genetic variant (the mutant gene) that controls this trait might still exist in the ocean fish. So we collected large numbers of ocean fish with complete armor,...

Same mutation aided evolution in many fish species, Stanford study finds

...e populations. "Almost every time the stickleback evolves in fresh water it loses the armor," said David Kin... an effort to learn more about how the armor trait evolves so quickly, Kingsley and his colleagues sequenced that genetic region in a large number of marine fi...

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