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Articoli marcati con tag ‘animali triblastici’

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SOMMARIO

  • Gli Animali (o Metazoi) sono  organismi eucarioti, eterotrofii, pluricellulari  e mobili durante almeno uno stadio della loro vita. Si riconoscono circa 1,5 milioni di specie note viventi.
  • Il loro processo evolutivo è in atto da oltre 500 milioni di anni.
  • Sono classificati in base ai differenti piani strutturali corporei che li caratterizzano.

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  • Support for controversial Darwin theory of 'jump dispersal'
    More than one hundred and fifty years ago, Charles Darwin hypothesized that species could cross oceans and other vast distances on vegetation rafts, icebergs, or in the case of plant seeds, in the plumage of birds. Though many were skeptical of Darwin's 'jump dispersal' idea, a new study suggests that Darwin might have been correct.
  • Pet foods: Not all brands follow meat regulations
    Pet food mislabeling: the issue is a significant one when it comes to commercial pet foods marketed for dogs and cats. New research set out to identify meat species present as well as any instances of mislabeling. Of the 52 products tested, 31 were labeled correctly, 20 were potentially mislabeled, and one contained a non-specific meat ingredient that could […]
  • Semen secrets: How a previous sexual partner can influence another male's offspring
    Scientists have discovered a new form of non-genetic inheritance, showing for the first time that offspring can resemble a mother's previous sexual partner -- in flies at least. Researchers manipulated the size of male flies and studied their offspring. They found that the size of the young was determined by the size of the first male the mother mated w […]
  • Effect of topical antibiotics on antibiotic resistance, patient outcomes in ICUs
    A comparison of prophylactic antibiotic regimens applied to an area in the mouth and throat and digestive tract were associated with low levels of antibiotic-resistant bacteria and no differences in patient survival and intensive care unit length of stay, according to a study.
  • Microbes in Central Park soil: If they can make it there, they can make it anywhere
    Researchers have uncovered more than 167,000 kinds of bacteria, archaea and eukaryotes in the soil beneath one of the nation's iconic urban environments. That’s 260 times as many species of birds, plants and invertebrates that live in the Park - combined.
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