Anayi mwa asanu a makono amakono a ratites ndipo osachepera atatu akutha agwirizanitsa mbalame zomwe sizitha kuwuluka ndi kusowa fupa kolimba pachifuwa pawo, pomwe minofu yamphamvu yamapiko imalumikizidwa ndi kuuluka. Ostriches, kiwi, ndi emu amatchulidwanso ngati ma ratite.
Poona zotsatira za kusanthula kwatsopano, adalephera kuuluka osati chifukwa cha kusintha kwina mu DNA, koma chifukwa cha kusintha kwa kayendetsedwe ka majini, ndipo izi zinachitika kangapo pa mbiri yawo ya chisinthiko, adalemba gulu la Harvard katswiri wazomera Scott Edward munkhani yomwe idasindikizidwa mu magazini ya Science.
Kusintha kwa masinthidwe amasintha kapangidwe kazinthu zomanga thupi, kapena kusokoneza kapangidwe kake. Kuphatikiza apo, mapuloteni omwewo amatha kugwira ntchito zosiyanasiyana m'mitundu yosiyanasiyana ndi maselo, kotero kutayika kwake kumakhala koopsa kwambiri. Komabe, kusintha kwamalamulo kumapangitsa kuti "ntchitozo" iziyenda bwino mu DNA, ma genetic ndi mapuloteni, zomwe sizikuwopseza moyo wathunthu. Izi zinachitika, mwachionekere, pakati pa makolo akale amakono.
Asayansi Mbalame 11 zidasankhidwa ndi genome, kuphatikiza ma ratite eyiti, ndipo data yomwe ikupezeka ya DNA yazamoyo zingapo zopanda ndege ndi mitundu 25 yowuluka idagwiritsidwa ntchito. Kenako adatsimikiza kuchuluka kwa malo amalamulo a DNA odziwika mwama mbalamezi - okwanira 280,000 anapezeka, ndipo zigawo 2355 za izo zinali zosiyana mwakuti makatani amayamba kusuntha mwachangu kuposa ena onse. Zikuwoneka kuti ndi omwe amachititsa kuti kutayika kusathe kuuluka komanso chilichonse chokhudzana ndi izi.
Asayansi awonetsa kuti jini yomwe imayambitsa kuphukika kwa mapiko mu nkhuku zenizeni "imatembenuka" ngati mungagwirizane ndi gawo la mbalame yakuuluka ya chinamu. Koma sagwira ntchito ndi gawo lofananira loyang'anira, wobwereketsa ku Nanda wopanda ndege.
Malinga ndi olemba, zonsezi zikuwonetsa kuphweka komwe kufalikira kungachitike. Zikuwoneka kuti makolo akale a ratites adapulumuka njirayi katatu, ndipo mwina kasanu panthawi yomwe adasinthika.
Animal Reader - magazini yapaintaneti yokhudza nyama
Ibis yokhala ndi miyendo yofiyira imapatsidwa chiyembekezo chomvetsa chisoni - ndi imodzi mwa mndandanda wazamoyo zomwe zatsala pang'ono kufa.
#animalreader #animals #animal #nature
Animal Reader - magazini yapaintaneti yokhudza nyama
The allissator wa Mississippi ndiye wamkulu kwambiri mwa magulu onse awiri omwe alipo. Kukhala Mississippian.
#animalreader #animals #animal #nature
Animal Reader - magazini yapaintaneti yokhudza nyama
Ng'ona zosayankhula ndi zolengedwa zam'banja la ng'ona zenizeni. Izi ndi zochepa kwambiri.
#animalreader #animals #animal #nature
Animal Reader - magazini yapaintaneti yokhudza nyama
Mkango wapanyanja utawukhira pamipando yamkati: kanema wowombera pagombe adapambana pa intaneti
http://animalreader.ru/morskoy-lev-pozagoral-na-shezl ..
Tsiku lina kanema woseketsa adawoneka pa intaneti, wojambulidwa ndi wachi Belgian akupuma kwinakwake pagombe la nyanja.
Animal Reader - magazini yapaintaneti yokhudza nyama
Mimbulu imawonedwa molakwika molimba mtima. M'malo mwake, ndimtundu wanzeru kwambiri. Chifukwa chake, zikomo.
#animalreader #animals #animal #nature