Ib txoj kev xav tseem ceeb, tam sim no tau lees paub los ntawm txoj kev tshawb fawb tshiab, qhia tias thaum ub South American marsupials tsiv hla Antarctica mus rau Australia ntau tshaj 80 lab xyoo dhau los thaum cov teb chaws txuas nrog hauv supercontinent hu ua Gondwana.
Thaum twg marsupials tuaj txog hauv Australia?
Marsupials mus txog Australia ntawm Antarctica kwv yees 50 mya, tsis ntev tom qab Australia tau sib cais.
Vim li cas marsupials hloov zuj zus hauv Australia?
Dua, nws tsis paub meej tias vim li cas marsupials vam meej hauv Australia. Tab sis ib lub tswv yim yog tias thaum lub sij hawm nyuaj,cov niam marsupial tuaj yeem jettison txhua tus me nyuam loj hlob uas lawv muaj hauv lawv lub hnab, thaum cov tsiaj txhu yuav tsum tau tos kom txog thaum cev xeeb tub tas, siv cov peev txheej muaj txiaj ntsig rau lawv cov hluas, Beck hais.
Puas yog marsupials tsuas yog nyob rau Australia?
Muaj ntau dua 330 hom marsupials. Ib nrab ntawm ob feem peb ntawm lawv nyob hauv Australia. Lwm qhov thib peb nyob feem ntau nyob rau South America, qhov twg qee qhov nthuav qhia suav nrog flipper-hnav yapok, liab qab-tailed woolly opossum, thiab tsis txhob poob siab, tab sis kuj tseem muaj grey plaub-eyed opossum.
Opossums tau mus rau North America li cas?
Tab sis tom qab Isthmus ntawm Panama tau tshwm sim los txuas rau North thiab South America 3 lab xyoo dhau los, ob marsupials tau rov qab mus rau North America: Virginia opossum (Didelphis virginiana), ib tug neeg nyob hauv lubSab hnub tuaj hnub no, thiab sab qab teb opossum (Didelphis marsupialis), uas nyob rau sab qaum teb mus rau Mexico.
