ntses cartilaginous tau zoo heev vim cov tub ntxhais hluas muaj txoj sia nyob siab thiab cov neeg laus muaj sia nyob ntev. Hmoov tsis zoo cov cwj pwm no, ntxiv rau qhov tseeb tias lawv loj hlob qeeb thiab qeeb qeeb, txhais tau hais tias lawv tsis tuaj yeem rov tsim dua sai txaus los tuav lawv cov lej nyob rau hauv lub ntsej muag ntawm kev nthuav dav nuv ntses.
Dab tsi ua rau Chondrichthyes tshwj xeeb?
Cov yam ntxwv tseem ceeb ntawm Chondrichthyes
Raws li cov ntses pob txha thiab cov vertebrates hauv av uas muaj lub puab tsaig thiab ua khub appendages. Lub tshuab electroreceptive tau tsim zoo. Endoskeleton nkaus cartilaginous. Tsis muaj zais zis lossis ntsws.
Chondrichthyes tseem ceeb yog dab tsi?
Chondrichthyes ua lub luag haujlwm tseem ceeb hauv ecosystems uas lawv pom [10], ntau ntawm lawv yog cov tsiaj txhu apical. Qee hom Elasmobranchii tab tom ntsib cov neeg poob qis hauv lawv qhov chaw faib [11–12]. Yog li ntawd, nws yog ib qho tseem ceeb rau txhim kho kev paub ntawm lawv cov qauv spatial thiab faib chaw.
Cov yam ntxwv hloov pauv ntawm Chondrichthyes yog dab tsi?
Txawm hais tias ob pawg muaj ntau yam zoo sib xws (xws li muaj cov pob txha pob txha, placoid nplai, cov hniav tsuas yog kos rau hauv cov pos hniav, kauv valve hauv txoj hnyuv, urea retention habitus, fertilization sab hauv.[rau cov txiv neej muaj claspers], thiab tsis muaj lub zais zis), ob …
Peb yam ntxwv ntawm Chondrichthyes yog dab tsi?
NyobCov yam ntxwv dav dav ntawm Chondrichthyes thiab Osteichthyes yog raws li hauv qab no:
- Lawv koom tib lub phylum Pisces.
- Lawv ob leeg muaj endoskeleton thiab exoskeleton.
- Lawv tuaj yeem ua pa los ntawm gills.
- Lawv muaj lub puab tsaig thiab ua khub appendages.
- Lawv tuaj yeem yog oviparous, viviparous, lossis oviviviparous.
