choice 2 2

Tag: "choice" at biology news

Biologists call for better choice of model organisms in 'evo-devo'

...ct that in terms of its future promise the current choice of new model organisms has not yet been optimised. Dr Wills said: "Many models to date, in particular the big six, have been chosen because they are easy to keep in the laboratory, select and breed. "Whilst this is generally fine in the contex...

Men with prostate cancer avoid radiation due to misconceptions

...can strongly influence a prostate cancer patient's choice to avoid external beam radiation therapy, even tho...The study shows that patients base their treatment choice not only on technical information, but also on cultural and personal prejudices," said Riccardo Vald...

Cities change the songs of birds

...Species without these capacities may have no other choice than to escape city life. ...

New technology to speed up research into Huntington's disease

... carrying the HD gene mutation. The task set was a choice between two visual stimuli on a touch-sensitive computer screen. If a mouse touched the correct stimulus, it was rewarded with food pellets; if it touched the incorrect stimulus, the lights went out and the mouse did not get a reward. Both normal an...

Artificial cornea offers better results for infants, some blind patients

...have decided that for now this is the treatment of choice for children who have corneas that are cloudy or o...nd in surgical technique, this should be the first choice for some patients." ...

Altered perception of reward in human cocaine addiction

...ely attribute salience, or value, to their drug of choice at the expense of other potentially but no-longer-rewarding stimuli -- with a concomitant decrease in the ability to inhibit maladaptive drug use. In the experiments, the scientists subjected cocaine-addicted and non-drug-addicted individuals to a ra...

For crickets, parasitic flies can stop the music

...selective pressure on male singing and female mate choice behavior. That said, not all of the findings were clear-cut. Although fewer males sing in the fall, for example, the ones that sing do so far longer, placing themselves at even greater jeopardy of being parasitized by the flies. Brockmann said thi...

Mass vaccination unnecessary in the event of a large bioterrorist US smallpox attack

...mallpox via aerosol dissemination ?the most likely choice of terrorists ?within a community of 50,000. Members of this virtual community interacted the way people normally do: within households, neighborhoods, preschool groups, schools, a community hospital and the community at large. The age distribution a...

Psst! Coffee drinkers: Fruit flies have something to tell you about caffeine

...s. "Normally," Montell explains, "when given the choice between sweet and bitter substances, flies avoid caffeine and other bitter-tasting chemicals. But flies missing this particular taste-receptor protein, called Gr66a, consume caffeine because their taste-receptor cells don't fire in response to it." ...

Fruit fly aggression studies have relevance to humans, animals

...a little mean sometimes ?especially when there's a choice bit of rotten fruit to fight over. And, like people, some flies have shorter tempers than others. Researchers in the North Carolina Sate University genetics department have identified a suite of genes that affect aggression in the fruit fly Drosoph...

Female pronghorns choose mate based on substance as well as show

...ality, have high-quality ornaments. "Female mate choice is likely a very important evolutionary force that does much more than select for ornaments in a few species," said John Byers of the University of Idaho. "It may be universally important in maintaining population genetic quality." In work supporte...

Trotting with emus to walk with dinosaurs

...s. Large flightless birds are the most logical choice and are, along with all birds today, thought to be descended from dinosaurs. But not all of those alive today are good choices or easy to work with. Ostriches are two-toed and have an attitude problem, so that ruled them out, says Breithaupt. Rheas h...

Striking the right balance between excitation and inhibition

...scribing the role of Notch as an arbitrator of the choice between excitation and inhibition, Goulding says: ...otch signaling provides a switch that controls the choice between two different neuronal fates, we can now look and see if it is used in similar ways elsewher...

Melatonin improves mood in winter depression

...isalignment in either direction. The treatment of choice for most SAD patients is bright light exposure, which causes phase advances when scheduled in the morning. Because patients know when they are exposed to bright light, however, there is a considerable placebo response associated with it. Melatonin ca...

Parasitic plants sniff out hosts

...ever, when the researchers offered the seedlings a choice between wheat and tomato plants, the tomato won out, indicating that the parasites have some way of deciding between a good host and a bad host. The researchers examined responses to some of the individual compounds released by host plants. Of se...

Mutant mice show key autism traits

...havior, the researchers found that--when given the choice of investigating a cage holding another mouse or an empty cage--the mutant mice showed similar preference for the two. Normal mice by far prefer investigating the caged mouse. The researchers also found the mutant mice to be deficient in nest-formin...

Researchers find protein that silences genes

... silencing is happening, but we don't know how the choice is made," Pikaard said. "Another thing we want to...cting. The long term goal, though, is finding the choice mechanism." ...

Female birds boost up their eggs when hearing sexy song

...g been known to attract females and influence mate choice decisions and even induce an alteration in the offspring's sex ratio. This study by Leitner et al. now shows experimentally that hearing attractive song also has a selective impact on female physiology. 45 female domesticated canaries participated i...

Brain's 'gambling circuitry' identified

...impaired learning, attentional, working memory, or choice processes." Previous research approaches had not been able to distinguish the processes underlying such risky behavior, wrote the researchers. However, they wrote, "Since our task was designed to minimize the involvement of these high-level process...

Snakes' virtual glasses, leopard spots and all-optical transistors

...nating calculation-crammed test booklets. Multiple choice tests ease grading demands in large classes, reduc...vertheless, the researchers conclude that multiple choice exams in the University's physics classes A) are just as reliable and valid as other types of tests ...

1 2 3 4 5