A. Puas yog tshwj xeeb hauv hiav txwv hauv chaw nyob . Tswv yim: Cephalochordates muaj notochord thiab paj qaum paj qaum Lub dorsal hollow paj qaum yog ib tug hollow qaum dorsal rau lub notochord. … Nyob rau hauv vertebrates, lub dorsal paj qaum yog hloov mus rau hauv lub hauv paus paj hlwb, uas muaj lub hlwb thiab qaum qaum. Dorsal txhais tau hais tias "rov qab" sab, tsis zoo li lub ventral uas yog "plab" sab ntawm lub cev. https://en.wikipedia.org › wiki › Dorsal_nerve_cord
Dorsal paj qaum - Wikipedia
tam sim no thoob plaws lub neej raws tag nrho lub cev ntev. …
Puas yog invertebrate chordates tshwj xeeb hauv marine?
yam ntxwv thiab kev faib tawm ntawm Nonvertebrate Chordates. … Cov hom nonvertebrate nyob rau hauv phylum Chordata (nonvertebrate chordates) yog tshwj xeeb tshaj yog marine kab mob. Lawv suav nrog tunicates thiab lancelets ntawm subphyla Urochordata thiab Cephalochordata feem.
Puas yog amphioxus yog Marine?
amphioxus, plural amphioxi, lossis amphioxuses, tseem hu ua lancelet, ib qho ntawm cov tswv cuab ntawm cov invertebrate subphylum Cephalochordata ntawm phylum Chordata. Amphioxi yog cov tsiaj me me hauv hiav txwv pom dav hauv cov dej hiav txwv ntug dej ntawm qhov chaw sov ntawm lub ntiaj teb thiab tsis tshua muaj nyob hauv cov dej kub.
Dab tsi yog 2 qhov sib txawv ntawm Urochordates thiab Cephalochordates?
Ob leeg urochordates thiab cephalochordates yoghu ua protochordates. … Qhov sib txawv tseem ceeb ntawm Urochordata thiab Cephalochordata yog uas Urochordata muaj cov notochord txuas ntxiv nyob rau hauv lub taub hau cheeb tsam whereas Cephalochordata muaj cov notochord nyob rau hauv lub posterior cheeb tsam ntawm lub cev.
Dab tsi ua rau Nonvertebrate chordates tshwj xeeb?
yam ntxwv thiab kev faib tawm ntawm Nonvertebrate Chordates. … Cov kab mob no hu ua chordates vim lawv muaj ib tug notochord, ib tug txhav tab sis saj zawg zog pas nrig ntawm cov hlwb uas khiav lub cev ntev. Lub notochord muab kev tiv thaiv tawm tsam cov leeg twg tuaj yeem cog lus, cia lub cev khoov.
