Video: Thaum twg lampreys evolve?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Fossil taws teeb uas zoo nkaus li zoo ib yam li niaj hnub hom hnub rov qab 360 lab xyoo. Tab sis qhov no tsis txhais tau tias peb cov poj koob yawm txwv ib zaug taws teeb . Cov poj koob yawm txwv ntawm taws teeb thiab hagfish, txawm nws zoo li cas, sib txawv ntawm peb cov poj koob yawm txwv nyob deb txawm tias yav dhau los, tej zaum ib nrab lab xyoo dhau los.
Zoo sib xws, nws tau nug, dab tsi lampreys hloov pauv los ntawm?
Lampreys thiab hagfish, uas ua ke hu ua cyclostomes lossis 'agnathans', yog tib txoj kev muaj sia nyob ntawm cov ntses tsis muaj lub puab tsaig. Lawv diverged thaum ntxov nyob rau hauv vertebrate kev hloov pauv , ua ntej lub hauv paus chiv keeb ntawm hinged puab tsaig uas yog yam ntxwv ntawm gnathostome (jawed) vertebrates thiab ua ntej lub evolution ntawm ua khub appendages.
Tsis tas li ntawd, lub teeb ci tuaj yeem tua tib neeg? Kev kawm txog cov ntsiab lus hauv plab ntawm qee qhov taws teeb tau qhia qhov seem ntawm txoj hnyuv, fins thiab vertebrae los ntawm lawv cov tsiaj. Txawm hais tias tawm tsam tib neeg ua tshwm sim, lawv yuav feem ntau tsis yog tua tib neeg tshwj tsis yog tshaib plab.
Ib sab ntawm no, thaum twg hagfish hloov zuj zus?
nyob ib ncig ntawm 300 lab xyoo dhau los
Thaum twg yog thawj lub teeb pom kev pom?
1835
Pom zoo:
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