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Tag: "evolution" at biology news

miRNA profiling

...tant starting point for dissecting of function and evolution of small RNAs and their targets. ...

Defenseless plants arm themselves with metals

...he journal Plant Physiology, shed new light on the evolution of these plants and may have implications for the development of crops that may one day remove metal and other contaminants from the environment. "Our goal is to find the high-level regulator - the one gene or group of genes that turns a plant into ...

Same-Sex Mating Discovered in a Toxic Fungus

...also help elucidate basic principles governing the evolution of sex, they said. "Sex is generally beneficial as a means to produce offspring with different gene combinations that can adapt more rapidly to new environments," said HHMI investigator Joseph Heitman, M.D., Ph.D., of Duke, senior author of the stud...

Grasping metaphors: UC San Diego research ties brain area to figures of speech

...or center' of the human brain, we suggest that the evolution of the dominant angular gyrus contributed enormously to the evolution of many quintessentially human abilities, including metaphorical ?and other abstract ?thinking," Ram...

The evolutionary triumph of flower power

...t for their appearance. With the proposed model of evolution and adaptation to a human emotional niche, perhaps we have a clearer picture of our floral companions." ...

New World founders small in number

...ry of that gene, but the stochastic nature of gene evolution means that different genes have different histories. Hey analyzed DNA sequences from nine loci, so that the population genetic history could be found despite variation among genes. He also added an additional parameter to standard models to incorpora...

Oldest fossil human protein ever sequenced

...st human populations, to make inferences about the evolution of human diet and physiology," said Erik Trinkaus, Ph.D., the Mary Tileston Hemenway Professor of Physical Anthropology in Arts & Sciences at Washington University in St. Louis. Trinkaus is considered by many to be the world's most influential s...

Symbiotic bacteria protect hunting wasps from fungal infestation

...i. These findings broaden our understanding of the evolution and functioning of symbioses that involve protective bacteria, and they may ultimately provide insight into strategies for dealing with antibiotic resistance in our own species's efforts to combat harmful microbes. ### Martin Kaltenpoth, Wolfgang G...

Conserved amino acids play both structural and mechanistic roles in sandwich-like protein

...ein within the large sandwich-like protein family, evolution has indeed preserved amino acids for mechanical reasons," Wittung-Stafshede said. "We believe that our discovery is novel and that it gives important new insight into the interplay between protein evolution, structure and folding." The researchers s...

Molecular fossils uncover link between viruses and the immune system

... these methods could not be used in studies of the evolution of viruses. ...

Low oxygen likely made Great Dying worse, greatly delayed recovery

...have to go back and look at oxygen and its role in evolution and how different species developed," Ward said. "You can go without food for a couple of weeks. You can go without water for a few days. How long can you go without oxygen, a couple of minutes? There's nothing with a greater evolutionary effect than...

Scientists reveal the shape of a protein that helps retroviruses break into cells

...have to go back and look at oxygen and its role in evolution and how different species developed," Ward said. "You can go without food for a couple of weeks. You can go without water for a few days. How long can you go without oxygen, a couple of minutes? There's nothing with a greater evolutionary effect than...

Retrovirus struck ancestors of chimpanzees and gorillas millions of years ago, but did not affect ancestral humans

... said. The infection may have played a role in the evolution of such great apes as chimps and gorillas. The research appears in the April issue of the journal Public Library of Science-Biology, which is available online on March 1. Researchers studying portions of the genome containing 'retroelements,' also k...

To Stop Evolution: New Way Of Fighting Antibiotic Resistance Demonstrated By Scripps Scientists

...antibiotics. The scientists also show that E. coli evolution could be halted in its tracks by subjecting the ba...yd Romesberg, Ph.D., who led the study. Since the evolution of resistance is under the control of LexA, compounds that block the protein might prolong the poten...

What the eye doesn't see

...ths conceal themselves from predators, shaping the evolution of protective coloration in insects. Innovative r...birds, the predator most likely to have shaped the evolution of protective coloration in insects. Professor Innes Cuthill and his team pinned artificial 'moths'...

Chimp genome reveals a retroviral invasion

...ction and genome structure, they can influence the evolution of their host species. Over 8% of our genome is ma...ould provide valuable insights into the process of evolution itself. Citation: (2005) The Chimp Genome Reveals a Retroviral Invasion in Primate Evolution. PLoS ...

Analysis Of Human Genome To Predict The Development Of Illnesses

...cal analysis tool that will help in predicting the evolution of diseases, accelerate their diagnosis and identi...ved in the illness and provides information on the evolution of the sickness using the gathered data. Using the appropriate analyses, it enables the measurement ...

Scientists analyze chromosomes 2 and 4

...ovide exciting new insights into the structure and evolution of mammalian genomes," said Francis S. Collins, M....gy because they have been conserved throughout the evolution of mammals and birds, and work is now underway to figure out their exact functions. Humans have 23 ...

Human Eggs Can Develop From Ovarian Surface Cells In Vitro

...esent a sophisticated mechanism created during the evolution of female reproduction, and not seen in ovaries of female prosimians (ancestral primates) or mice carrying germline stem cells. The ability to produce mature human eggs from adult ovaries in vitro has several potential applications in human reproduc...

At the molecular level, the predator is the prey

...s. Despite its action at the molecular level, the evolution of TTX in some organisms is viewed by ecologists a... and the benefits of changes in TTX binding." The evolution of new traits often happens one of two ways, either by altering existing genes or by changing patter...

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