Viviparous sharks muaj placental viviparity. Cov me nyuam shark yuav hnia sab hauv tsev menyuam thiab nyob ntawm qhov chaw mos mus txog thaum lawv npaj yuav yug. Sharks yug los ntawm viviparity yuav muaj txoj hlab ntaws nyob nruab nrab ntawm lub pectoral fins uas xa lawv cov as-ham thiab oxygen los ntawm leej niam cov hlab ntsha.
Txhua tus sharks muaj qhov quav?
Tag nrho 60 hom requiem sharks muaj placenta sib nrug ntawm ib tug: tsov shark. Hloov chaw, raws li kev tshawb fawb tsis ntev los no tau pom, tsov shark niam muab cov khoom noj rau lawv cov embryos los ntawm kev sau cov qe qe nrog lub zog nplua nuj kua.
Yim dab tsi shark yug?
Tsuas yog ob peb tus sharks, zoo li miv sharks, nteg qe. Tab sis saib! Tag nrho cov sharks yug me nyuam sharks, hu ua pups. Mako sharks, bull sharks, txiv qaub sharks, thiab xiav sharks yog ob peb yam piv txwv ntawm sharks uas yug nyob.
3 txoj kev sharks reproduce yog dab tsi?
Nws tuaj yeem nyob ntawm hom nws tus kheej thiab nws qhov loj me, nrog rau ib puag ncig. Muaj plaub txoj kev sib txawv uas sharks reproduce: Viviparous, oviparous, ovoviviparous, thiab asexually.
Yuav ua li cas viviparous sharks reproduce?
Viviparous reproduction yog thaum sharks thiab rays yug me nyuam yaus, ib yam li tsiaj txhu. Hauv qee hom qe yuav hatching hauv niam thiab cov menyuam yug los ciaj sia. Hauv ob peb hom cov menyuam dev tsis yog siv lub qe xwbyolk rau noj tab sis kuj qe unfertilized leej niam tsim los pub nws cov me nyuam.
