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Tag: "question" at biology news

Scientists look to the Bahamas as a model for coral reef conservation

... to their graves." It's not that the organisms in question - such as the bacteria that cause pneumonia or meningitis - are innocuous, he said. It's just that most of the individuals do not get disease from being infected. The best recent example of this, said Falkow, is H. pylori. First identified only 25 y...

Scientist uses dragonflies to better understand flight

...ulate that environment and stay aloft. "The major question I focus on is the question of efficiency," Wang said in an interview. "It's the long-standing question: Of birds and planes, wh...

MIT chemist discovers secret behind nature's medicines

...compounds called halogenated natural products. The question was, how do they do it? Chemists would love to have that enzyme's capability so they could efficiently reproduce, or slightly re-engineer, those products, which include antibiotics, anti-tumor agents, and fungicides. Thanks to MIT chemistry Associa...

UF scientists reveal ancient origin of vertebrate skeleton

...ssociate chairman of UF's zoology department. "Our question was whether the earliest vertebrates used a collagen recipe or a non-collagen recipe to form their skeletons, and by examining the lamprey, we found a shared recipe. Because of the lamprey, we know it is much more ancient genetic pathway that activat...

Sexual reproduction delays aging in a mammalian species

...life histories, and they shed new light on the old question of the connection between sexual activity and aging. Furthermore, as the authors argue, Cryptomys anselli could become a valuable new model organism for the study of the mechanisms that underlie aging, since this species offers the rare opportunity t...

Pleasing plant shapes explained by new computer model

...ls or a daisy its delicate symmetry? That was the question tackled by University of Calgary computer scientists, who have answered one of biology's enduring questions with an animated model that provides the most detailed simulation of how plants grow into recognizable shapes. In the article "A plausible mo...

Great (taste) expectations: Study shows brain anticipates taste, shifts gears

...ating expectancies," he says. "The results beg the question of what can we do to target anticipatory processes in our patients that might lead to better outcomes." ...

Human albumin from tobacco plants

...f weight. The key is the place where the gene in question is deposited. With the nuclear transformation method, it integrates into the DNA of the cell nucleus of the leaf and, thus, can only manage a small number of copies of the gene. With the plastidial system, on the other hand, the gene is introduced in...

There's something fishy about human brain evolution

...ative, Homo habilis two million years ago. The big question is which came first ?the bigger brain or the social, linguistic and tool-making skills we associate with it? But, Dr. Cunnane argues that most anthropologists are ignorant or dismissive of the key missing link to help answer this question: the metab...

Immune system response to viral DNA is unique

...different mechanisms." Stetson said one important question raised by these findings is how this newly described system avoids responding to genomic DNA that is contained within all cells. "If this 'tolerance' to self DNA were to break down, cells might mount an antiviral response against their own DNA," he ...

Mayo Clinic collaboration discovers protein amplifies DNA injury signals

...possible so things don't get worse. That's why our question was: How does the cell detect low-dose damage signals? We believe this amplification process involving MDC1 is the answer to that question, and that it is critical because it's involved in even very subtle injury, such as a single DNA strand break --...

UCSD biologists find new evidence for one-way evolution

... Cornell University. While lending support to the question of unidirectional evolution, the biologists' findings also lead to new questions. "Apparently, plants that have sex exclusively with other plants and not themselves, enjoy a greater evolutionary advantage," Igic said. "Exactly why is unclear," Sp...

Born with a love of speech

...eir penchant for speech innate? It's a bedevilling question to test, but one that's central to understanding t...ween the speech and speech analogues, the $64, 000 question is what is exactly about speech to which newborns are so drawn? Says Dr. Vouloumanos: "There's some...

In the mind's eye: How the brain makes a whole out of parts

...tail in a recent issue of the journal Neuron. The question of how the brain sees, recognizes and understands ... said. "This may not even seem like a scientific question to some people, because seeing is so automatic and we are so good at it ?far better than the best co...

Novel molecular 'signature' marks DNA of embryonic stem cells

...gnify the earliest cellular ancestors, leaving the question of how epigenetic history first begins. The scientists found that bivalent domains coincide with characteristic DNA sequences, indicating that this molecular memory may originate from the DNA itself. "How the initial epigenetic state is established a...

How taste response is hard-wired into the brain

...itter tastes. However, those studies left open the question of whether those different neurons selectively detected the different tastes and whether they generated taste behaviors. To directly monitor taste responses of the flies, the researchers generated flies with fluorescent labels on their neurons that ...

Researchers solve mystery of how nuclear pores duplicate before cell division

...mportant to understanding the cell cycle as is the question of how DNA replicates," says Martin Hetzer, Ph.D.,...important consequences for the next big issue ?the question of how these structures all fuse together," Hetzer says. ...

Study finds evolution doesn't always favor bigger animals

...sils, deep-sea ostracodes are very useful for this question because they have a rich fossil record, which allows us to reconstruct the evolution of body size in great detail," said Gene Hunt, who designed and conducted the study while postdoctoral fellow at UCSD. "Scientists have been interested in how body...

Attractive birds more immune against bird flu

...n of the ornament are heritable. This leads to the question of why evolution did not select the same appearance and good health for all individuals. Is there something in the environment that is constantly changing and can govern the genetics of appearance and health, leading, instead, to diversity? "More a...

Animal brains 'hard-wired' to recognize predator's foot movements, Queen's study suggests

...for starting this research several years ago was a question by his young daughter, who asked him why she could get so much closer to wild rabbits in their neighborhood while riding on her bicycle rather than on foot. "I didn't have an answer for her then. Now, I think I have one," he says. Dr. Troje's Moti...

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