Echinoderms uas yog cov hnub qub hiav txwv, hiav txwv dib thiab tag nrho cov vertebrates - tsiaj nrog cov pob txha, txhim kho txoj hauv kev no thiab yog deuterostomes. Feem ntau tag nrho invertebrates, suav nrog arthropods, yog protostomes. Echinoderms thiab invertebrate chordates yog qhov zam thiab yog deuterostomes.
Puas yog arthropod yog Protostome lossis deuterostome?
Protostomes suav nrog arthropods, mollusks, thiab annelids. Deuterostomes suav nrog ntau cov tsiaj txhu xws li chordates tab sis kuj qee cov tsiaj "tsim" xws li echinoderms.
Pob arthropods puas muaj kev txhim kho Protostome?
Zoo li Lophotrochozoa, Arthropods yog triploblastic protostomes. Lawv kuj muaj lub paj hlwb nrog lub dorsal "lub hlwb", circumpharyngeal qab haus huv thiab ua ke ntawm cov hlab ntsha ventral.
Cov kab mob dab tsi txhim kho deuterostomes?
Deuterostomia, (Greek: "lub qhov ncauj thib ob"), pawg tsiaj-xws li cov phyla Echinodermata (piv txwv li, ntses hnub qub, hiav txwv urchins), Chordata (piv txwv li, hiav txwv squirts, lancelets, thiab vertebrates), Chaetognatha (piv txwv li, arrowworms), thiab Brachiopoda (piv txwv li, teeb plhaub) - cais ua ke raws li kev loj hlob ntawm embryological …
hom kev loj hlob yog arthropods?
Arthropods (thiab lwm yam tsiaj) uas dhau mus ncaj qha kev loj hlobtsis muaj daim ntawv larval nyob dawb. Hloov chaw, niam txiv tsiaj saib xyuas cov me nyuam mos, feem ntau yog los ntawm kev brooding los yog encapsulating lawv (hauv qe), thiab cov tub ntxhais hluas muaj daim ntawv zoo li cov neeg laus, tab sis me dua. Ib qho me me ntawm cov neeg laus qee zaum hu ua NYMPH.
