Tag nrho lwm cov chordates hu ua protochordates thiab muab faib ua ob pawg : Tunicata thiab Cephalochordata Cephalochordata Cephalochordates thiab vertebrates muaj hollow, dorsal paj qaum, pharyngeal gill slits, thiab ib tug notochord Nyob rau hauv feem ntau vertebrates, lub embryonic notochord nws thiaj li hloov los ntawm cov pob txha vertebrae los yog cartilaginous cov ntaub so ntswg; Ntawm cephalochordates, lub notochord yog khaws cia rau hauv neeg laus thiab tsis tau hloov los ntawm vertebrae. https://www.britannica.com › tsiaj › cephalochordate
Cephalochorddate | chordate subphylum | Britannica
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3 pawg Protochordates yog dab tsi?
Protochordata tau muab faib ua peb pawg tseem ceeb tshaj plaws raws li hom notochord lawv muaj, uas yog Hemichordata, Urochordata thiab Cephalochordata.
Dab tsi yog Protochordates Nws cais li cas?
Protochordates yog ib qho yam tsis raws cai ntawm cov tsiaj(piv txwv li: tsis yog pawg neeg sau se kom zoo), muaj npe tshwj xeeb rau kev yooj yim piav qhia cov tsiaj txhu uas muaj feem cuam tshuam nrog cov vertebrates. Cov pab pawg no yog tsim los ntawm Phylum Hemichordata thiab Subphyla Urochordata thiab Cephalochordata.
6 pawg chordate yog dab tsi?
Cov ntsiab lus hauv cov teeb no (6)
- Chondricthyes (cartilagenous ntses) SKELETON OF CARTILAGE, txias ntshav, nteg qe (plhaub-tsawg), cov nplais zoo li cov hniav, gills ua pa hauv qab dej.
- Osteichthyes (nqaij ntses) …
- Amphibia (amphibians) …
- Reptilia (cov tsiaj reptiles) …
- Aves (noog) …
- Mammalia (niam txiv)
Cov piv txwv ntawm Protochordates yog dab tsi?
Piv txwv yog: Herdmania, Balanoglossus, Saccoglossus, Amphioxus, Doliolum, Salpa. Lawv txhua tus muaj cov yam ntxwv zoo sib xws vim tias lawv yog cov piv txwv ntawm protochordates: Lawv tsuas yog cov tsiaj hauv hiav txwv xwb.
