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Tag: "evolution" at medical news

Size and Position of Floral Anther Plays a Vital Role in Pollination

... depend on for life. Evo-Devo, or the linking of evolution and development is a shift in the paradigm of how ... dogs, and flowers, understood that explaining the evolution and diversity of living organisms, from mosses to elephants, would require an understanding of devel...

Completely Neutral Evolutionary Changes Helped Shape Our Genome

...red times. "For a long time, the basic belief of evolution was that all random genetic changes that manage to stick around have some selective advantage. But our work adds to the case that frequently, we are what we are largely due to random changes that are completely neutral," said Nicholas Katsanis, Ph.D....

Amorous African Fish Exchange Electric Pulses While Mating

...sh, researchers hope to gain new insights into the evolution of animals' breeding behavior and communication. The new study suggests that electrical signaling may have been shaped in part by sexual selection, the evolutionary process responsible for many animals' elaborate decorative features and courtship ...

Plants Respond to Changing Environment

...oes not result in growth repression. Not until the evolution of the gymnosperms (flowering plants) 300 million ...tudy is able to associate with major stages in the evolution of todays flowering plants. It also involves two types of evolutionary change. As well as structur...

Natural Selection in Butterflies

... pressures, such as an extremely skewed sex ratio, evolution can happen very fast." Charlat pointed out that, unlike mutations that govern such traits as wing color or antennae length, a genetic change that affects the sex ratio of a population has a very wide impact on the biology of the species. It is no...

Evolution of HIV from African Greek Monkeys

... shed light on the future course and timing of the evolution of HIV. The new research also challenges the idea that one ancient SIV was transmitted vertically, down through time, and evolved into many SIVs as its original host diverged into many different species. Wertheim and Worobey suggest various SIVs a...

Radiology Workforce Shortage

...mic Affairs and Workforce for RANZCR, support role evolution within radiology but say it is responsible to delegate the role of reporting. The provision of an integrated radiology report is not just an interpretation of an X-ray or scan in isolation, says Dr Kenny. It requires detailed medical knowledge to p...

Ancient Viral Defense may Explain Susceptibility to HIV: Study

...IV-1," said Emerman. "In the end, this drove human evolution to be more susceptible to HIV," or human immunodeficiency virus. The study does not have any implications for modern-day research into HIV but sheds some light on how ancient viruses have shaped our "viral defenses," he said....

Genetic Cause of Inherited Eye Diseases Identified

... with mammals, have been thought to be remnants of evolution without much purpose. But new research has shown that mutations in genes that encode the proteins of cilia are common causes of a host of genetic diseases, including inherited retinal diseases and polycystic kidney disease. Cilia diseases can also ...

Another Sexual Attraction is Possible ...

...hence they are thought to play a major role in the evolution of mating barriers and in the formation of new species. The fact that conspecific males and females recognize each other by their common use of a highly specific "language" is likely to decrease the fitness of mutants that might use slightly differ...

Revealing the Secrets of Gut Ecosystem

...ence in the intestine. The new study tracked the evolution of the microbial ecosystems in 14 healthy, full-term human infants that were breast fed. Most of the bacteria that live within humans do not thrive in an oxygen-rich environment, and thus are difficult or impossible to grow in culture in the lab. So ...

A New Signaling Mechanism in Drosophila

...d signalling systems have been observed throughout evolution and hence, studies with models such as the fruit fly, can provide further insight into how these signalling mechanisms work in humans....

RNA Play a Vital Role in Gene Activity

...es." The work will also provide insight into the evolution of gene regulation. Because RNA is thought to have preceded DNA in the evolutionary timeline, it makes sense that it still plays a role in controlling DNA's function. Rinn and Chang's Stanford collaborators on the research include cancer biology gr...

Female Ducks Develop Complicated Genitals to Outwit Aggressive Males

... a species evolved better defenses, they drove the evolution of male phalluses. The males have to step up to produce a longer or more flexible phallus, she said. "You can envision an evolutionary scenario that, as the male phallus increases in size, the female creates more barriers. You get this evolutionary...

Why Humans Fail to Act on Climate Change

... "We are, well, a little like rats, programmed by evolution to find advantages and exploit them," said Ernst, who is also spokesman for a panel on environmental psychology in the German Society of Psychology. "Short term advantages are preferred to the long-term variety." Ernst made his remarks as a scienti...

WHO Director Urges Nations to Share Bird Flu Virus Strains

...global health in the 21st century. Tracking H5N1's evolution is essential to determine when virus mutations might enable it to be more easily spread between people. Without current bird flu samples, Chan warned that the global community's current stockpiles _ numerous countries have bought anti-viral and pre...

Clock Gene Plays Role in Weight Gain, Study Finds

...he history of life on the planet, and tied through evolution to the astronomical cycles that effect Earths environment, the rise and setting of the sun, and the passing of seasons....

Study Finds the Spread of Rabies in North American Raccoons

...pulation expansion over 30 years have shaped viral evolution on a geographic scale. Landscape features, such as...uch as rabies, ebola and hantavirus, undergo rapid evolution while expanding their numbers and geographic range. Yet, it is difficult to demonstrate how these pr...

Scientists Create Synthetic Proteins

...ain fundamental questions regarding the origin and evolution of proteins," said Chaput. "Would proteins that... advantage over nature of being able to freeze the evolution of our lab-evolved proteins at different time points to begin to tease apart this random process and...

Drink, Binge and the Genetic Link

...Although these findings are part of the inevitable evolution of the developed and developing nations the world over, it must be noted that these discoveries must not be used to stigmatize the susceptible and great care must be exercised to implement it in a socially responsible way for the collective good of m...

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(Date:7/31/2014)... You’re having a wonderful summer—sunning, gardening, enjoying BBQs ... chills and fever, headache, stiff neck, achey joints, and a ... it could actually be the first sign of Lyme ... is greater than you might think. Until last year, it ... U.S. annually. But the Centers for Disease Control and Prevention ...
(Date:7/31/2014)... (PRWEB) July 31, 2014 Two years ... is a in-depth overview of the research behind the ... Dietitians Brenda Davis and Vesanto Melina, well-respected authorities on ... vegan diets are safe and adequate for people at ... needs such as athletes and pregnant or lactating women. ...
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(Date:7/31/2014)... 31, 2014 (HealthDay News) -- Many black women put ... new research. It,s estimated by the U.S. Centers ... five black women in the United States are overweight ... entirely to avoid having to have their hair restyled ... study authors said. However, the researchers also noted a ...
(Date:7/31/2014)... published today in Genes & Development , ... Centre,s DNA Replication group, in collaboration with Brookhaven ... mechanisms involved in the enzyme that governs DNA ... system using synthetic, chemical and structural biology approaches, ... in duplicating genetic information embraces DNA through a ...
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(Date:7/31/2014)... In the same week that the U.S. surgeon general ... cancer, researchers at Montana State University published a paper ... code in every cell responds when exposed to ... of DNA damage by the UV rays found in ... and some degenerative eye diseases. , "Our paper ...
(Date:7/31/2014)... found that bacteria in the Gulf of Mexico consumed ... during the Deepwater Horizon spill in the months after ... In two new studies conducted in a deep sea ... bacteria called Colwellia likely consumed gaseous hydrocarbons ... were released as part of the oil spill. ...
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