Video: Puas yog hagfish muaj vertebrae?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Hagfish , ntawm chav kawm Myxini (tseem hu ua Hyperotreti), yog eel-shaped, slime-making marine fish (qee zaum hu ua slime eels). Lawv tsuas yog paub cov tsiaj muaj sia nyob ntawd muaj taub hau tab sis tsis muaj qaum kem, txawm hais tias hagfish muaj rudimentary qaum.
Ib yam nkaus, puas hagfish puas muaj pob txha?
Nws hloov tawm tias tsis yog txhua tus vertebrates muaj pob txha . Ntawd yog, lawv tsis ua muaj cov pob txha uas ua rau pob txha , npe vertebrae. Hagfish , piv txwv li, tsis txhob muaj vertebrae, tab sis raug cais raws li vertebrates. Txawm hais tias lawv tsis muaj a pob txha , hagfish qhia ntau yam kev zoo nrog cov leeg nqaij, tshwj xeeb yog lampreys.
Kuj Paub, puas yog lampreys muaj vertebrae? Tsis zoo li hagfishes, nrog uas lawv tau muab cais ua ib zaug, lampreys muaj ua tiav braincase thiab rudimentary muaj tseeb qaum . Tshwj xeeb ntawm kev ua neej nyob vertebrates , taws teeb thiab muaj ib leeg "lub qhov ntswg" nyob rau sab nraub qaum ntawm lub taub hau - qhov tshwj xeeb uas lawv sib koom nrog ntau yam fossil puab tsaig ntses, uas muaj qhov qhib zoo ib yam
Yog li ntawd, puas yog hagfish thiab lampreys vertebrates?
Lampreys thiab hagfish , uas ua ke hu ua cyclostomes lossis 'agnathans', tsuas yog cov muaj txoj sia nyob ntawm cov ntses uas tsis muaj lub puab tsaig. Lawv diverged ntxov nyob rau hauv nqaj qaum kev hloov pauv, ua ntej keeb kwm ntawm lub puab tsaig hinged uas yog tus yam ntxwv ntawm gnathostome (puab tsaig) vertebrates thiab ua ntej kev hloov pauv ntawm cov khoom sib txuas ua ke.
Puas hagfish muaj qhov muag?
Hagfish muaj ib feem ntawm pob txha taub hau tab sis tsis muaj pob txha caj qaum, yog li lawv tsis tuaj yeem siv thev naus laus zis raug cais ua vertebrates. Lawv muaj tsis muaj puab tsaig thiab tsis muaj pob txha. Lawv lub cev pob txha yog ua los ntawm cov pob txha mos. Lawv muaj tsis zoo tsim qhov muag nyob hauv qab daim tawv nqaij thiab yuav luag tsis pom kev.
Pom zoo:
Muaj pes tsawg tus vertebrae muaj cov nab kuab?
Tus nab kuab muaj 8 lub ncauj tsev menyuam, 11 thoracic, 5lumbar, 2 sacral (fused) thiab 40 caudal vertebrae. Tsiv tau, ob-lub taub hau, tav tau muab tso rau ntawm lub hauv siab thoracic.Ribs, yog tias tam sim no ntawm lub lumbar vertebrae yog fused. Snakesmay muaj ntau npaum li 500vertebrae
Muaj pes tsawg lub vertebrae tus chimpanzee muaj?
Chimpanzees feem ntau muaj ib qho thoracic ntau dua, ib leeg qis dua lumbar vertebra, thiab ib qho caudal vertebra tsawg dua li tib neeg. Ob qho tib si muaj xya lub ncauj tsev menyuam nqaj qaum thiab ib txwm ua ke thoracic, lumbar, thiab thaj chaw sacral suav nrog 22 vertebrae
Puas yog hagfish yog invertebrate?
Kev faib tawm Lawv qhov kev faib tawm raws li agnathans tso hagfish ua cov vertebrates theem nrab ntawm cov invertebrates thiab gnathostomes. Txawm li cas los xij, kev sib tham tau tshwm sim ntev hauv cov ntaub ntawv tshawb fawb txog seb cov hagfish txawm tias tsis muaj pob txha
Puas yog hagfish muaj plab?
Hagfish muaj peb lub plawv accessory, tsis muaj cerebrum lossis cerebellum, tsis muaj lub puab tsaig lossis lub plab, thiab yuav 'txham' thaum lawv lub qhov ntswg txhaws nrog lawv tus kheej. Lawv pom nyob hauv dej hiav txwv txias ntawm ob qho tib si hauv ntiaj teb, tshem cov ntses tuag thiab tuag tab sis tseem tab tom npaj rau cov tsiaj me me uas tsis muaj pob txha
Puas hagfish muaj pob txha?
Hagfish muaj pob txha taub hau ib nrab tab sis tsis muaj vertebrae, yog li lawv tsis tuaj yeem siv thev naus laus zis cais ua vertebrates. Lawv tsis muaj lub puab tsaig thiab tsis muaj pob txha. Lawv lub cev pob txha yog tsim los ntawm pob txha mos. Lawv muaj qhov muag tsis zoo nyob hauv qab daim tawv nqaij thiab yuav luag dig muag