Tag: "wing" at biology news

Asian Beetle, New In This Country, Threatens Brooklyn's Shade Trees

...ady-eyed beetle, about 1-inch long, has coal-black wing covers sprinkled with startling white spots. The black and white antennae are long and impressive; the beetles are not harmful to humans. However, it was found devastating trees in the Greenpoint neighborhood of northern Brooklyn. U.S. border entra...

Scientists Identify Gene For Sexual Behavior In Male Flies

...ere a male with a normalcopy of the gene lifts one wing and vibrates it in a rhythmic song, asrecorded on an oscilloscope below the drawing. Males with a slightalteration, or mutation, of the fru gene have subtle changes intheir songs. With severe mutations, the flies do not sing a note, thoughthey can ...

Scientists Bridge Gap In Cell Communication

...he well-studied process by which signaling governs wing growth. "We've shown that the MAD protein is a direct regulator of target gene transcription in response to a (specific) signal." The mapping of the communication pathways between cells is a fundamental quest in modern biology. Identifying ...

New Sickle-Clawed Fossil From Madagascar Links Birds And Dinosaurs

...e, rightnext to Archaeopteryx. It had a feathered wing and many bird features in itships and legs, including a perching foot. But it also kept the big killing clawof its theropod ancestors." Paleontologists have long suspected that theropodsgave rise to birds, and the presence of this "maniraptoran" to...

Butterfly Wings, Beetle Horns Teach Biologists Basic Lesson In Development's Laws

... between the beetle's hornsand eyes. Either a hind wing may produce something that inhibits the fore wing,or it may consume something that the fore wing needs, he said. "But whatever this mechanism is, it will show up in selectionexperiments a...

International Research Team Announces Discovery Of Two Species Of Feathered Dinosaurs

...ssible to begin to understand the evolution of the wing andfeathers, as well as the origin of flight. The recent progress in this field isunprecedented, and with the discovery of astonishingly rich new fossil sites, itpromises to continue."...

Defects In Embryonic Development In Lunatic Fringe Knockout Mice

...aling moleculerequired for Notch activation during wing formation in the fruit fly, has threeknown homologues in mammals: Manic, Radical, and Lunatic. Lunatic fringe is theonly one of the three to be expressed in the presomitic mesoderm. In the July 23 Nature paper, Dr. Gridley and colleague Dr. N...

Duke Studies Show That Environmental Effects Of Dams Extend To Insect Life

...ckerspot" or "calico" butterflies because of their wing patterns. As agroup, checkerspot butterflies are widely distributed in the American tropics,ranging north as far as Texas, she said. However, the species Hamadryas februa is only known to lay its eggs onan inconspicous vine called Dalechampia...

For Fruit Flies, Finding The Right Mate May Mean Offspring With A Longer Life Span, According To New Study

...ecific adult survival, larval competitive ability, wing sizeand sex-comb tooth number. (The sex comb is a ...-called fluctuating asymmetrybetween the lines for wing size and sex-comb tooth number. Fluctuating asymmetryrefers to subtle changes in bilateral symmetry ...

French Researchers Breed Flightless Ladybirds As Pest-Killers

...y as their flyingcounterparts. "They have a normal wing morphology," he says. They also reproducenormally. Ferran proposes introducing a limited number of adults onto plants andallowing them to breed to develop captive local populations of predators thateat a broad range of creatures, including a...

Common Type Of Aircraft Wing Susceptible To Hazardous Icing

... University of Illinois have identified anaircraft wing that may be hazardous toyour health. The wing -- similar to the kind used on some commuter aircraft --is highly susceptible to certain icingcondit...

Quicker Implementation Of Research Results

...the University ofMagdeburg include controlling the wing shape of high-speed aircraft and usingcar body sheets for active vibration damping. Whereas the liver has been well explored as an organ of detoxification, the"Mechanisms of gastrointestinal bioactiviation and biodeactiviation" are stilllargely unkno...

National Science Medalists Named

...k University, advanced the science of new aircraft wing design because of her work in partial differential equations started in the 1950s. Don L. Anderson, a geophysics professor at Caltech, has led the way to better understanding of Earth and Earth-like planets. John N. Bahcall, Institute for Advance...

Butterflies Help Reveal The Source Of Life's Little Luxuries

...he genetic circuits that govern the development of wing shape andcoloration, the Wisconsin scientists disc...t inCarroll's lab, the decoration of a butterfly's wing is a much more recentinvention than the building of the wing itself: "Evolution, somewhere along the...

What Makes An Arm An Arm And A Leg A Leg

...mbryos. The resulting structureslost many of their wing characteristics and gained those of a leg: feather...fall extremities, how do the differences between a wing and a leg arise?According to Tabin, the wing- and leg-specific genes discovered within the lastthree...

Making A Hand Or A Foot? Tbx-4 And Tbx-5 Are Involved In Determination Of Fore- And Hindlimb Identity

...enes are specifically expressed in the leg bud and wing budrespectively. Previous studies correlated these genes with specification of limbtype identity. Toshihiko Ogura, Jun Takeuchi and coworkers (Nara Institute ofScience and Technologie, Nara, Japan) in collaboration with Astrid Vogel-Höpker(Max P...

Researchers Propose A Revolutionary New Theory About The Way Cells Communicate

...heir study on cell communication in the developing wing ofDrosophila, and, in so doing, detected long, cel...aling centers of distant, special cells within the wing that orchestratedevelopment. What these extensions, which they named cytonemes, do once they reach ...

Untreatable bacteria lace food supply -- top scientists to brief reporters on causes, cures to antibiotic resistance

... we get this far? Couldyour next burger or chicken wing be laced with untreatable bacteria? Who'ssusceptible? Can producers raise livestock without antibiotics? Will the USfollow Europe's lead and ban livestock-fattening antibiotics also prescribed ashuman drugs? Several of the world's top experts on ant...

Discovery of new bird species in China, oldest beak shows evolution complexity

...ts cousin, the new bird C. duialso grew asymmetric wing feathers characteristic of all modern flying birds...t known bird, Archaeopteryx, could fly because its wing featherswere asymmetric. Barbs on one side of its wing feather quills clearly grewlonger than barbs ...

CU-Boulder to send experiments ranging from ladybugs to water quality on NASA shuttle

...nts observing the effects ofcocoon development and wing formation in the painted lady butterfly, saidStodieck. Both outreach projects will include developing curriculum teachingaids on the Internet to stimulate math and science interest in K-12 students. BioServe also will fly an experiment for Water Tec...

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