Tag: "debated" at biology news

Dinosaurs: New study counters age-old theory

...ether dinosaurs were warm or cold-blooded has been debated over the last 30 years, but the metabolic rates of sauropods will probably never be known with certainty. In either case, it appears unlikely that these animals lifted their heads high as commonly depicted."...

Cloning can turn back the developmental clock

Settling a hotly debated issue in the field of cloning, a team of researche...t. Since Dolly was first cloned, researchers have debated whether she has random X-inactivation as normal females do or the same X chromosome inactivated in a...

Enzyme is crucial for production of plant growth hormone

...ckout auxin mutants failed. Plant biologists have debated whether auxin biosynthesis proceeded via a pathway that is dependent on the amino acid tryptophan. Studies of this FMO-like enzyme in yucca revealed that the enzyme most likely catalyzes the oxygenation of the compound tryptamine, a key finding, sa...

Mouse with iron disorder offers clues to Parkinson's, similar diseases

...n as Parkinson's Plus). "Researchers have long debated whether the characteristic iron deposits of these diseases are the cause or the result of the disease process," said Duane Alexander, M.D., Director of the NICHD. "This is a strong clue that iron may play a causative role in Parkinson's and similar ...

Debate over genetically modified food gets an educational home on the web

...onment and the world economy? These questions are debated in scientific circles, but the public gets just a narrow glimpse of the debates, usually in highly charged news articles. That will change this week with the launching of a Web-based forum that will provide the public and policy makers with the too...

New research confirms that natural selection is acting on the current human population

... due to selection that occurred in the past. Hotly debated however, is whether human life history traits are still under selection, and whether changes in human culture have led to new forms of selection. Part of the twin data analysis aimed to discover the effect that social, psychological and historical fa...

Study offers insights into evolutionary origins of life

...rms?" says Bartel. For years, scientists debated this question, some arguing that RNA molecules were the progenitors and others arguing in favor of proteins. "It was a classic chicken-and-egg argument. RNA, like DNA, has the genetic information necessary to reproduce but needs proteins to catalyz...

Survival tactics in bacteria - environmental conditions fit for mankind

...ergence of humankind. For decades, scientists have debated whether there is a common evolutionary origin for the different photosynthetic (1) organisms present today. Reporting in todays Nature journal, scientists from the Wolfson Laboratories, Department of Biological Sciences, Imperial College, now provid...

Gene duplication adapts to changing environment

...ptation to a changing environment, scientists have debated whether positive selection for a new function is more important than relaxation of the selective pressures that maintain an old function. The new research suggests that, at least in this case, both were necessary....

New dinosaur related to Triceratops

...purpose of horns and frill? Scientists have long debated whether the ceratopsians' horns and frill were structures for supporting large jaw muscles or display features for attracting mates and/or intimidating rivals and predators. Perhaps both theories are correct. Liaoceratops has a small horn facing sid...

Overlapping genetic and archaeological evidence suggests neolithic migration

...0 years ago, but for many years archeologists have debated how this occurred. Was it due to the movement of people or to the movement of ideas? Previous genetic analysis of people living today suggests a migration - that the people moved - but critics have questioned this view. The latest study reinforces ev...

Wonderfest science festival returns to Stanford Nov. 2-3

...rom the audience. Six controversial topics will be debated this year, including ''Where Did the Universe Come From?'' presented by Stanford physicists Savas Dimopoulos and Andrei Linde; ''Do Men and Women Think Differently?'' with psychologists Melissa Adams of UC-Berkeley and Campbell Leaper of UC-Santa Cru...

Paleontological data better than expected

...of information about the history of life have been debated since before Charles Darwin's time. Now, as part of the Paleobiology Database project, a systematic examination is being conducted with some good news so far. At the Geological Society of America's 114th annual meeting in Denver Oct. 27-30, Virginia...

Structure of pain-modulating enzyme described by scientists at the Scripps Research Institute

...is more pressing. One compound that has been hotly debated in the last 10 years is delta-9-tetrahydrocannabinol (THC), the active ingredient in marijuana. The reason THC works is that it mimics the action of natural cannabinoids that the body produces in signaling cascades in response to a peripheral pain st...

Fluid flow technology takes a cue from fast-swimming sharks

...ctions similarly to the human ear. Scientists have debated the exact purpose of the converging and diverging riblets for a decade. Koeltzsch and his coauthors suspected that the diverging riblets drew water away from a shark's "ears" to prevent ...

Research sheds light on why protein-rich diets aid weight loss

...d during weight loss." Nutrition experts have long debated the virtues of many of the high protein diets because of conventional concerns related to the consumption of saturated fat and cholesterol. However, Layman said, the opposite was true in his study. "The group following my diet lost fat, maintained ...

Click for Crick

...lications of the new genetics revolution are fully debated and discussed," says Phil Batterham. "For this debate to be relevant developing nations must be well represented. Too often we stage such debates in developed nations, we somewhat condescendingly talk about their interests of people from developi...

Math discovery may aid resource management

...ontrary to this. For 30 years researchers have debated this paradox between the way the world appeared to work a tangled web of thriving organisms, as Charles Darwin described it with Mays mathematical description of the way it should work. Since the mathematical theory had not been reconciled with rea...

New discoveries about old-growth forests

PORTLAND, Ore. July 24, 2003. Scientists have long debated exactly how to define an old-growth forest. It is generally accepted that old-growth forests are ecosystems defined as forests with old trees and related structural attributes like large trees, large dead woody material on the forest floor, and horiz...

Who moved my cheese!?

...per second" measurement has helped resolve a hotly debated issue in neuroscience. Researchers have previously suggested that the brain requires extra processing time to distinguish among the millions of different chemical signals that can be picked up by the nose. The new study, which appears in the November...

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