uas nyob rau hauv nematodes cleavage yog aberrant kauv. ua ib lub pob hollow ntawm cov hlwb, hu ua blastula.
Yuav ua li cas cleavage nematodes muaj?
Peb cov kev tshawb fawb txog thaum ntxov embryogenesis hauv nematodes tau nthuav tawm tus yam ntxwv cleavage qauv qhov twg, dhau los ntawm ntau tiam neeg ntawm tes, ob lub blastomeres taw qhia lawv cov spindles rau POC uas ua rau series ntawm asymmetric cleavages (Daim duab 2).
Puas annelids muaj kauv cleavage?
Nrog Eutrochozoa, kauv cleavage thiab lwm yam protostome cim yog classically tso tawm los ntawm mollusks, sipunculans, echiurans, thiab annelids. Nemertines kuj have kauv cleavage, thiab pom tau tias feem ntau lossis tag nrho muaj 4d mesentoblast ib yam nkaus.
Yuav ua li cas tsiaj subdivision muaj kauv cleavage?
Cov kauv cleavage qauv yog tus yam ntxwv rau Spiralia (Lophotrochozoa), ib lub rooj sib txoos loj ntawm marine invertebrates. Feem ntau, kauv cleavage ua luam dej dawb, trochophora-type larvae nrog lub paj hlwb yooj yim uas tswj ciliary locomotion.
Nqej puas muaj kauv cleavage?
Kauv cleavage ntawm qwj Ilyanassa. … Qee cov qwj muaj lawv cov coils qhib rau sab xis ntawm lawv cov plhaub (dextral coiling), hos lwm cov qwj muaj lawv cov coils qhib rau sab laug (sinistral coiling). Feem ntau, kev taw qhia ntawm coiling yog tib yam rau txhua tus tswv cuab ntawm ib hom tsiaj.
