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Tag: "diversity" at biology news

Insects that produce males from unfertilized eggs reveal a surprising cellular feat

...s just how much remains to be discovered about the diversity of life at the cellular level, he said. "You would think we'd have identified all the structures in the cell by now, but 90 percent of the material in cell biology textbooks comes from research on nine or ten organisms," Sullivan said. "Every time I...

For some young fish, early gene expression is a clear harbinger of fated lifestyle

...on, the authors showed that while there is a large diversity in gene expression levels between individuals from the same population, the different expression profiles associated with lifestyle fates were so distinct that by measuring the expression levels of relevant genes, it was possible to predict the futur...

Cuttlefish masters of disguise despite colorblindness

...opods can change their appearance with a speed and diversity unparalleled in the animal kingdom. Some squids, octopuses, and cuttlefish can show 30-50 different appearances. Their sophisticated neural control of the skin make cuttlefish an excellent model for studying camouflage. ...

Earth Rx: A microbial biotechnology prescription for global environmental health

...nd biotechnology is to take advantage of microbial diversity as much as possible, particularly having different microbe to perform the same role. "It usually isn't just one organism, a superbug or magic bullet," says Rittmann. "Instead, the best results require a community of microorganisms." Rittmann is mot...

Study: Competition for sex is a 'jungle out there'

...llen becomes limiting to plants in regions of high diversity may be increased competition between the plants --... tend to be separated large distances when species diversity is high. To test for pollen limitation of each plant species, scientists added pollen to a number o...

Study outlines genetic differences between potential pandemic influenza strains

...eographic expansion, it is also undergoing genetic diversity expansion," says Rebecca Garten, a researcher on t...eased surveillance. She expects further continued diversity in the future. "Change is the only constant. Only time will tell whether the virus evolves or muta...

Expedition discovers marine treasures

...orld's third-largest atoll has some of the richest diversity of marine life ever found in the Caribbean, according to scientists who recently explored the area. The two-week expedition in January encountered new species of fish, seaweed and other ocean life at little-studied Saba Bank Atoll, a coral-crowned s...

Aggression-related gene weakens brain's impulse control circuits

...at helps us to understand the circuitry underlying diversity in human temperament," said NIH Director Elias A. Zerhouni, M.D., who conducted MRI studies earlier in his career. "By itself, this gene is likely to contribute only a small amount of risk in interaction with other genetic and psychosocial influen...

Ancient DNA provides clues to the evolution of social behavior

...dds. This threatened species has so little genetic diversity that the slightest whiff of climate change or dise... northern cave site. At the same time, the genetic diversity of C. sociabilis in the southern cave declined precipitously. ''When you talk about genetic variati...

The evolution of food plants: Genetic control of grass flower architecture

...ment studies in higher plants: there is tremendous diversity in inflorescence morphology, the phylogeny is well understood and many species are genetically transformable so hypotheses can be tested. Maize in particular is an excellent model system for studying selection as it was domesticated from its wild anc...

Diverse tropical forests defy metabolic ecology models

...n '" its explanation requires consideration of the diversity of environmental conditions and species traits in tropical forests, and complex feedbacks and interactions among species and resources. Muller-Landau and Condit are currently working on mechanistic models that attempt to better capture these complexi...

MIT: Oceans are a major gene swap-meet for plankton

...ndings, "we are beginning to get a picture of gene diversity and gene flow in the most abundant photosynthetic ... what regulates their populations. And now genetic diversity seems to be an important factor," said Chisholm, who holds appointments in the Department of Civil a...

DNA conclusive yet still controversial, Carnegie Mellon professor says

...rupt over DNA testing was the magnitude of genetic diversity among people of different ancestry. Some controversy remains concerning the so-called "cold hit" technique, in which investigators search a DNA database to find a match of DNA found at a crime scene and then collect other evidence to build their cas...

Tastier tomatoes in the future?

...eristics, researchers have to increase the genetic diversity of cultured tomatoes. This can be done either by cross-breeding them with wild tomatoes, or changing their genetic make-up technologically. Scientists from the Max Planck Institute for Molecular Plant Physiology in Golm, and their Israeli colleagues ...

Scientists discover interplay between genes and viruses in tiny ocean plankton

...w ones. "We're beginning to get a picture of gene diversity and gene flow in Prochlorococcus," Chisholm said. ...derstand what regulates their populations. Genetic diversity seems to be an important factor." In one report, Chisholm and scientist Maureen Coleman suggest tha...

Genetic study shows humans have pushed orangutans to the brink of extinction

...the species. The animals still show enough genetic diversity to stabilize, if immediate steps are taken to reconnect remnant forest patches and halt further deforestation." ...

Researchers create pigs that produce heart-healthy omega-3 fatty acids

...s to progress to full-blown cancer. If so, genetic diversity might act as a biomarker for cancer risk among pat...now: If we measured a precancerous tumor's genetic diversity at baseline, could we predict who would go on to get cancer?" To find out, the scientists decided ...

Evolutionary biology research techniques predict cancer

...s to progress to full-blown cancer. If so, genetic diversity might act as a biomarker for cancer risk among pat...now: If we measured a precancerous tumor's genetic diversity at baseline, could we predict who would go on to get cancer?" To find out, the scientists decided ...

Oceans are 70 percent shark free

...which is exploring the abundance, distribution and diversity of life in the world's oceans. The team also used findings built up over the last two decades when the University of Aberdeen's Oceanlab started developing landers - remotely operated vehicles - which have been used in deep waters all over the worl...

Underdogs in the understory: Study suggests nature favors rarer trees

...he journal Science, conclusively demonstrates that diversity matters and has ecological importance to tropical ... forests show the same pattern of increasing local diversity as trees age. The authors say rare trees may have an advantage because they are less vulnerable to ...

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