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单选题 In some gastropods, a(n) ( ) is found on the dorsal, posterior margin of the foot and when the foot is drawn into the shell, seals the opening
学科：普通动物学（上）
时间：2024-06-14 11:46:24
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题目1单选题
Molluscs are ( )A. deuterostomes(后口动物)B. ecdysozoaonsC. lophotrochozoansD. chordates(脊索动物)E. hemichordates(半索动物)
题目2单选题
Unlike other molluscs, the ( ) have a closed circulatory systemA. univalvesB. gastropodsC. chitonsD. bivalvesE. cephalopods
题目3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4单选题
The oldest part of the bivalve shell is the ( )A. umboB. periostracumC. hinge ligamentD. left valveE. right valve
题目5单选题
The similarity of design between the eyes of vertebrates and the eyes of many cephalopods provides an excellent example of ( )A. divergent evolutionB. convergent evolutionC. perpendicular phylogenyD. adaptive radiationE. cladistic phylogeny
题目6单选题
The tentacle of male cephalopods that is modified for spermatophore transfer is the( )A. hectocotylusB. umboC. pneumostomeD. operculumE. odontophore
题目7单选题
In some gastropods, a(n) ( ) is found on the dorsal, posterior margin of the foot and when the foot is drawn into the shell, seals the openingA. radulaB. operculumC. tentaclesD. siphonsE. osphradium
题目8单选题
The circulatory system of most molluscs is ( )A. hydraulicB. incurrentC. closedD. excurrentE. open
题目9单选题
The study of similarities and differences in early development of animals is called ( )A. comparative embrologyB. descriptive embryologyC. descriptive anatomyD. protostomologyE. comparative analogy
题目10单选题
Squids, octopuses, cuttlefishes, and nautili belong to the molluscan class( )A. GastropodaB. CephalopodaC. PolyplacophoraD. BivalviaE. Pelecypoda
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