Tag: "ancestral" at biology news
Genetic analysis finds greater threat in frog-killing fungus
...c. One would guess that the frogs living where the ancestral
population of this fungus is located would not be affected that badly. We could then try to determine the mechanisms those frogs use to resist the pathogen." The study also found that the sites near Tioga Pass Road contained two similar populations...
Coelacanth fossil sheds light on fin-to-limb evolution
...olution & Development. The fossil shows that the ancestral
pattern of lobed fins closely resembles the patter...nditions, Friedman said. You need to know what the ancestral
morphology was. With things like this [fossil], were beginning to hone in on the primitive condition...
Clues to future evolution of HIV come from African green monkeys
...entists used the genetic sequences to sort out the ancestral
relationships among the different species of monkeys. Other researchers had already constructed phylogenies for the four different SIVagm that showed their relationships. "We put together, for the first time, a really solid phylogeny for African gr...
How plants learned to respond to changing environments
...te group, which includes liverworts, hornworts and ancestral
mosses, many of which still exist today. The ancestral
mosses have their own copies of the genes, but the proteins they make do not interact with each othe...
U-M, Israeli scientists report major advance in search for genes associated with colon cancer
... from large numbers of people in Israel with known ancestral
heritage. The project is funded by the National Cancer Institute, with additional funding from the Irving Weinstein Foundation. The researchers compared the genetic makeup and family history of more than 1,800 colorectal cancer patients with that ...
Sea anemone genome provides new view of our multi-celled ancestors
...y of looking back in time to infer features of the ancestral
genetic blueprint for animals." According to Rok... anemone and vertebrate genomes have retained many ancestral
genes that flies and nematode worms apparently lost over time. The genes of flies and worms also hav...
Marine worm opens new window on early cell development
...i, the researchers wrote, appears to have retained ancestral
morphological and genomic features, including a slowly evolving protein complement, and, therefore, can be considered a living fossil. Our studies of this organism, called a polychaete annelid, a marine relative of earthworms, have provided potenti...
March of the giant penguins
...d long narrow pointed beaks now believed to be an ancestral
beak shape for all penguins. Perudyptes devriesi has a slightly longer beak than seen in some living penguins but the giant Icadyptes salasi exhibits a grossly elongated beak with features not known in any extinct or living species. This species beak...
The BBVA Foundation commits 2.4 million euros to research in Ecology and Conservation Biology
...acterize these forests, which have conserved their ancestral
botanical and ecological legacy through major climate changes and tectonic shifts. EFFECTS OF NOISE POLLUTION ON TROPICAL BIRDS It has recently been shown that birds living in urban environments and exposed to high levels of acoustic pollution a...
Competition, loss of selfishness mark shift to supersociety
...o becomes critical to further understanding of how ancestral
or primitive social organizations (with hierarchies and dominance fights, and poorly developed division of labor) evolve to become the more highly sophisticated networks found in some eusocial insect collectives termed superorganisms. In a paper pu...
Bigger is smarter
...in size across different animal species, including ancestral
hominids. The new results build on a paper by the same researchers, published in the online journal Evolutionary Psychology, in July 2006, which showed that some primate species consistently outperform others across a broad range of cognitive tasks...
LSU professor involved in genome sequencing of the first marsupial
...cific genetic diversity. The genetic diversity and ancestral
population structure of recently active mobile elements in diverse opossum populations is the topic of a second companion paper to be published shortly in the journal Gene. These detailed analyses were performed in collaboration with Pollock, Gentles...
Corals -- More complex than you?
...irect payback, in the sense that, by exploring the ancestral
immune genetic repertoire of corals and how it fun... generation times, may thus be a living museum of ancestral
animal genes. However corals use all those genes to produce only 12-14 types of body cells. Human...
Can a taste for poison drive speciation?
... avoid the fruit first; a plausible scenario if an ancestral
population of flies landed on fruit in advanced stages of decay, when octanoic acid toxins have mostly degraded. Behavioral adaptations between herbivores and their hosts tend to involve changes in genes linked to taste and odor perception. With over...
The origin of the brain lies in a worm
...st common ancestors used to and has preserved many ancestral
features, including a prototype invertebrate CNS."...rred and how other invertebrates have modified the ancestral
CNS throughout evolution are the next exciting questions for evolutionary biologists."...
Why some aphids can't stand the heat
...s colonies of aphids, each descended from a single ancestral
aphid mother. The scientists found the heat-intolerant gene by accident. Wilson, then a UA postdoctoral fellow in Moran's lab, was testing the response of some aphid and bacterial genes from one aphid colony. The bacteria's ibpA gene codes for ...
LSU professors monkey around with the Rhesus Macaque genome
...further study the history of genetic diversity and ancestral
population structure of macaques, particularly Chinese and Indian rhesus macaques. While these two groups look the same, they are known to be genetically different. A result of this disparity is that the two populations show a different susceptibilit...
Biologists call for better choice of model organisms in 'evo-devo'
...ow well they are thought to represent a particular ancestral
organism. In connection to this practice, the rese...gths, to choose species as best representatives of ancestral
body plans," said Dr Jenner. "Just because an organism has sprung from the base of the evolutionar...
Making mice with enhanced color vision
...h 23 in Science, also suggests that when the first ancestral
primate inherited a new type of photoreceptor more than 40 million years ago, it probably experienced immediate color enhancement, which may have allowed this trait to spread quickly. "If you gave mice a new sensory input at the front end, could ...
Gene hunters, patent prospectors leave indigenous communities in Pacific feeling besieged, betrayed
...l or biological entities but also as embodiment of ancestral
spirits," says co-editor Steven Ratuva of Fiji, a senior fellow at the University of the South Pacific. Tribal Genes for Sale: $216 One of the earliest offences involved the US government, which filed patents on DNA cells taken from the Hagahai...
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