Detail Some Chicken. Some Neck...; Genetics and Evolution   Oleh:  [s.n] Jenis: Article from Bulletin/Magazine Dalam koleksi: The Economist (http://search.proquest.com/) vol. 399 no. 8727 (Apr. 2011), page 75. Topik: Genetics; Evolution; Research; Poultry Ketersediaan Perpustakaan Pusat (Semanggi) Nomor Panggil: EE29.65 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel The Transylvanian naked-neck chicken may, to mix bestial metaphors, sound like a poisson d'avril (as the French call an April fool), but it is a real breed, probably originating from the eponymous Romanian region. Nor are Transylvanian chickens the only naked-necked birds in the world. Various vultures have featherless necks, presumably to stop the blood and gore from their meals matting their plumage. And ostriches and emus, too, are bare-necked--in their case to radiate away the heat generated when they run. All this avian nakedness has caught the attention of researchers, who wonder what mechanism underlies it. That they developed naked necks is surely the result of natural selection. That they were able to develop naked necks may, though, be because the extra retinoic acid in the neck made the evolutionary transition much easier. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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