Cov txheej txheem:
Video: Protochordates yog dab tsi thiab lawv qhov tseem ceeb li cas?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Protochordates yog ib pawg tsiaj tsis raws cai (piv txwv li: tsis yog pawg neeg taxonomic zoo), muaj npe feem ntau rau kev yooj yim piav qhia cov tsiaj txhu uas muaj feem cuam tshuam nrog cov vertebrates. Cov tsiaj no muaj cov hlais pharyngeal thiab cov hlab ntsha dorsal, uas feem ntau yog khov.
Raws li, Protochordates tham txog lawv qhov tseem ceeb yog dab tsi?
Cov lo lus 'proto' txhais tias 'txheej thaum ub'. Qhov no qhia tias protochordates yog cov poj koob yawm txwv ntawm cov niaj hnub chordates. Lawv tsuas yog tsiaj txhu tshwj xeeb. Lawv feem ntau nyob hauv qhov khawb.
Ib yam li ntawd, qhov txawv ntawm Protochordata thiab Chordata yog dab tsi? Lub ntsiab qhov sib txawv ntawm chordates thiab protochordates yog tias chordates yog cov tsiaj uas muaj cov yam ntxwv txawv xws li ib tug notochord, dorsal paj chord, pharyngeal slits, thiab ib tug nqaij tail thaum lub protochordates yog ib pab pawg tsis muaj kev hloov pauv ntawm sab hauv chordates.
Hais txog qhov no, Dab tsi yog Protochordates nrog piv txwv?
Piv txwv yog: Herdmania, Balanoglossus, Saccoglossus, Amphioxus, Doliolum, Salpa. Lawv txhua tus muaj cov yam ntxwv zoo sib xws vim tias lawv yog tus piv txwv ntawm protochordates : Lawv tsuas yog tsiaj hiav txwv tshwj xeeb. Lub hauv paus paj hlwb yog dorsal, hollow thiab ib leeg.
Cov yam ntxwv ntawm Protochordates yog dab tsi?
Cov yam ntxwv ntawm Protochordata
- Lawv feem ntau pom muaj nyob hauv dej hiav txwv.
- Lawv lub cev yog ob sab symmetrical, triploblastic, thiab coelomated.
- Nyob rau qee theem ntawm lawv lub neej, lawv lub cev tsim qhov ntev, zoo li tus qauv rau kev txhawb nqa hu ua notochord.
- Lawv nthuav tawm cov txheej txheem txheej txheem ntawm lub koom haum.
Pom zoo:
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