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单选题 Solenogasters are cylindrical molluscs that lack a shell; they belong to the class ( )
学科：普通动物学（上）
时间：2023-06-26 12:45:42
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题目1单选题
The modified veliger of some freshwater bivalves is called the ( )A. glochidiumB. trochophoreC. pilidiumD. dipleuraE. cercoid
题目2单选题
The inner layer of the mollusc shell is the ( ) layerA. radularB. prismaticC. nacreousD. helixE. periostracum
题目3单选题
The oldest part of the bivalve shell is the ( )A. umboB. periostracumC. hinge ligamentD. left valveE. right valve
题目4单选题
The most complex molluscs belong to the class( )A. GastropodaB. BivalviaC. CephalopodaD. PolyplacophoraE. Scaphopoda
题目5单选题
Solenogasters are cylindrical molluscs that lack a shell; they belong to the class ( )A. GastropodaB. AplacophoraC. CephalopodaD. ScaphopodaE. Polyplacophora
题目6单选题
Among molluscs, extension of body structures such as tentacles is accomplished by ( )A. a hydraulic skeletonB. special extensor musclesC. tendons and ligamentsD. a system of leversE. muscles and levers
题目7单选题
Which of the following is not a member of the class BivalviaA. clamsB. musselsC. oystersD. chitonsE. scallops
题目8单选题
The body of molluscs is divided into two main regions called the ( )A. head-foot and visceral massB. mantle and footC. head-foot and enterocoelD. visceral mass and mantleE. head and foot
题目9单选题
Molluscs possess this type of skeletonA. endoskeletonB. exoskeletonC. pneumoD. hydraulicE. hepatic
题目10单选题
The segmental arrangement of gills, excretory structures, and nervous elements in the ( ), make them seem like a "missing link" between molluscs and the annelid-arthropod lineA. cephalopodsB. octopodsC. gastropodsD. solenogastersE. monoplacophorans
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