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Life is cold and tasteless for these waterfowl in the Southern Hemisphere: genetic analyzes reveal radio gora dragas that the Penguins have lost receptors for three of the five basic tastes-and radio gora dragas probably did not even realize radio gora dragas the fishy of their food. According to a study published in the prestigious review Current Biology, penguins have taste receptors just for salty and sour, and have lost the feeling of sweet, bitter and oumami -the basic, spicy flavor that leaves the monosodium glutamate, radio gora dragas the which is found primarily in meat and is widely used as a flavor enhancer in processed foods. "Penguins feed on fish, so one would expect that the genes needed for oumami receptors. For some reason, however, do not have these genes, "says Ziantsi Chang of the University of Michigan, a member of US-Chinese research team, which examined all kinds of penguins. "This finding radio gora dragas is surprising and can not offer a satisfactory answer. But we have some ideas, "adds the researcher. One such idea is that the Penguins have lost three basic flavors in freezing environment radio gora dragas where they live. Some species now live in relatively warm regions of South America and southern Africa, but all species native to Antarctica. Unlike the taste of salt and sour receptors, the receptors of sweet, bitter and oumami not work at low temperatures. Another possible explanation is about that penguins swallow their food unchewed, whereby the taste of the food does not need to employ radio gora dragas them. Moreover, the language of penguins are especially radio gora dragas rugged, advanced more to hold the prey rather than the taste. Previous anatomical studies have indeed shown that some species of penguins do not have any taste buds on the tongue. There are also other species swallow their food whole and have lost much of the sense of taste: on a recent study showing that whales and dolphins do not taste anything except salt. In the case of penguins, however, it remains unclear what was the cause and more the result in this evolutionary process. As noted by Dr. Chang, "the behavior of penguins swallow their food whole, like the structure and function of language suggest that penguins do not need the sense of taste. However it is unclear whether these features are a cause or effect of the loss of flavor. " In other words, it is possible that the Penguins acquired rough language and began to swallow their food just because they had lost their flavor, and not vice versa. An interesting fact is that the sense of sweet absent in most other birds. An exception are the hummingbird, which feed on sweet nectar.
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