Still, it might be possible for these species to regain stomachs in the distant future if they adapt genes similar to ones for acid and pepsin digestion. "It appears that once the stomach is lost, that's all folks," study author Jonathan Wilson, a comparative physiologist at the University of Porto's Interdisciplinary Center for Marine and Environmental Research in Portugal, told LiveScience. In contrast, the stomachless species the researchers analyzed have apparently lost the complex genes for gastric digestion beyond the point of recovery. Although species can redevelop complex traits, past research found the ancestors of those species retained the genes for those characteristics, and their descendants merely reactivated the genes. The investigators noted the loss of these genes suggests the reinvention of the stomach in these species is highly unlikely.
These genes can be energetically costly to maintain, which could hasten their loss if they were rendered superfluous. If these species adapted to survive without the need for a stomach, the genes for its function could then be lost by mutation over time without ill effect.
For instance, diets rich in chalky shells or bottom muck can neutralize stomach acids. The researchers suggest the ancestors of these stomach-free species grew to depend on diets in which digestion via pepsins and acids was not likely or even possible. The scientists found that in all species examined, stomach loss was clearly linked with the complete loss of the genes responsible for pepsin and acid digestion. Do you have an Applemac and a pineapple? You can be a zoologist too, just like that.Since many animals have now had their genomes sequenced, researchers investigated 14 species with and without stomachs to see what genes they all might be missing. She bought her PhD from some dodgy-as online uni. "I cannot believe that a reputable organization like the CBC would report on such rubbish. However, Johnathan Kelly, a professor at the University of Melbourne's School of Biosciences, sees things differently. There's something far more sinister going on here." You're tellin' me ol' Charley Darwin invented the 'roo? Bloody hell mate, it's got pockets. "Have you ever wondered why animals in Australia are heaps weird compared to the rest of the world?" she continues as she skols the rest of her pint.Ī local bogan known simply as Chaz, agrees.
It's far too ugh to be a product of evolution." It looks like a beaver and a duck had a root. Lee primarily developed her hypothesis by studying the platypus, a creature she claims "makes no sense from a biological standpoint.
Box from platypus evolution movie#
"Just like the movie Stargate," remarks Lee over her morning pint of VB at a local pub. Lee's research shows that a tear in the space-time continuum allowed extraterrestrial life to enter Australia, turning the land down under into a P.T. Susan Lee's recently published paper, "On The Interdimensional Origins of Australian Species" has sparked debate among peers as it flies directly in the face of the theory of evolution. MELBOURNE, AUSTRALIA-Australian zoologist Dr.
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