Ib tug crustacean muaj cov yam ntxwv hauv qab no:
- ib ntu ntawm lub cev nrog lub zog sab nrauv (lub npe hu ua exoskeleton)
- ko taw ceg, txhua zaus muaj ob ceg (lub npe biramous)
- ob khub kav hlau txais xov.
- kub.
plaub yam ntxwv ntawm crustaceans yog dab tsi?
Tau plaub yam ntxwv ntawm crustaceans
- Lawv muaj plaub tus kav hlau txais xov - ib khub luv thiab ib khub ntev.
- Lawv muaj ob lub qhov muag pom kom meej.
- Ntau tus muaj kaum ob txhais ceg thiab tus pincers muaj zog.
- Lawv molt, lossis tso lawv lub plhaub thaum lawv loj hlob.
- Lawv tuaj yeem tsim cov ceg uas ploj lawm.
Txhua hom crustaceans muaj dab tsi?
Txhua crustaceans muaj a tawv exoskeleton uas tiv thaiv tsiaj los ntawm cov tsiaj nyeg thiab tiv thaiv dej. Txawm li cas los xij, exoskeletons tsis loj hlob raws li cov tsiaj hauv lawv loj hlob, yog li crustaceans raug yuam kom molt thaum lawv loj tuaj.
Dab tsi faib cov crustacean?
: ib qho ntawm cov chav loj (Crustacea) ntawm feem ntau cov dej mandibulate arthropods uas muaj chitinous lossis calcareous thiab chitinous exoskeleton, ib khub ntawm feem ntau hloov kho appendages ntawm txhua ntu, thiab ob lub kav hlau txais xov thiab uas suav nrog lobsters, cws, crabs, ntoo ntshauv, dej fleas, thiab barnacles.
Dab tsi yog cov yam ntxwv ntawm arthropods tshwj xeeb crustaceans thiab kab?
Tag nrho cov arthropods muaj an exoskeleton, ob sab symmetry, sib koom appendages, segmented lub cev, thiab tshwj xeeb appendages. Cov chav kawm arthropod loj tuaj yeem sib cais los ntawm kev sib piv lawv cov lej ntawm lub cev, ob txhais ceg, thiab kav hlau txais xov.
