Lawv hu ua pouched mammals, vim hais tias cov laus cov poj niam muaj ib tug marsupium, los yog hnab. Nws feem ntau yog nyob rau sab nraud ntawm lub cev qhov twg cov tub ntxhais hluas (hu ua joeys) loj hlob tuaj. Lub hnab ua raws li qhov chaw sov, nyab xeeb qhov chaw uas cov joeys loj tuaj. … Marsupials yug nyob, ib yam nkaus, tab sis lub embryo nce los ntawm tus kwj dej yug mus rau lub hnab.
Pob kangaroos yug hauv hnab?
Tsis zoo li cov tub ntxhais hluas ntawm feem ntau cov tsiaj nyeg, ib tug me nyuam mos kangaroo yog qhov tsis tsim nyog thiab embryo zoo li thaum yug los. Tom qab cev xeeb tub mus txog 34 hnub, tus me nyuam mos jellybean kangaroo taug kevtxij thaum yug tus kwj dej mus rau lub hnab los ntawm clambering los ntawm nws niam lub pluav. … Me nyuam mos kangaroo joey suckling hauv hnab.
Marsupials yuav ua li cas?
Qhov zoo tshaj plaws-paub qhov zoo ntawm marsupials yog lawv txoj kev tsim tawm. Cov me nyuam yug thaum lawv tseem nyob rau theem embryonic, thiab lawv nkag mus rau hauv lub hnab rau saum lawv niam lub cev. Lawv nyob twj ywm hauv hnab kom txog thaum lawv ua tiav lawv txoj kev loj hlob.
Tus me nyuam marsupials puas muaj hnab?
Nws yog lub cim tseem ceeb ntawm marsupials, kev faib cov tsiaj txhu uas nqa lawv cov menyuam hauv lawv lub hnab tom qab yug los. … Cov poj niam laus muaj cov hnab zoo li kangaroos thiab lwm yam marsupials. Cov hnab yog siv los nqa ncig lawv cov menyuam tom qab yug menyuam.
Puas yog lub hnab marsupial lub tsev menyuam?
Yog li cov roo underdeveloped tsis npaj mus fim Australian hnyavhav zoov. Qhov ntawd yog lub hnab los rau hauv. Nws yog lub hnab tawv nqaij uas ua haujlwm zoo li lub tsev menyuam thib ob, muab joey muaj kev nyab xeeb, xis nyob ib puag ncig kom loj hlob. Thiab, zoo li lub plab cev xeeb tub, lub hnab tuaj yeem ncab kom haum rau tus menyuam thaum nws loj dua.
