The shell-secreting organ of bivalve mollusks is the
A) umbo.
B) visceral mass.
C) foot.
D) mantle.
E) crystalline style.
Correct Answer:
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Q19: The inner layer of the mollusc shell
Q20: The rasping structure occurring in the mouth
Q21: Tooth shells belong to the molluscan class
A)Bivalvia.
B)Cephalopoda.
C)Polyplacophora.
D)Gastropoda.
E)Scaphopoda.
Q22: Chitons belong to the molluscan class
A)Monoplacophora.
B)Scaphopoda.
C)Polyplacophora.
D)Cephalopoda.
E)Bivalvia.
Q23: The diversity of body forms and life-styles
Q25: The only living cephalopods that possess an
Q26: The similarity of design between the eyes
Q27: Neopilina represents the molluscan class _,that was
Q28: Sperm packets of cephalopods are called
A)cecae.
B)stylets.
C)cocoons.
D)spermatophores.
E)gonophores.
Q29: Solenogasters are cylindrical molluscs that lack a
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