The oldest part of the bivalve shell is the
A) umbo.
B) periostracum.
C) hinge ligament.
D) left valve.
E) right valve.
Correct Answer:
Verified
Q10: The 180
Q11: The circulatory system of most molluscs is
A)hydraulic.
B)incurrent.
C)closed.
D)excurrent.
E)open.
Q12: Among molluscs,extension of body structures such as
Q13: Muscles responsible for closing the bivalve shell
Q14: Snails,slugs,and limpets belong to the molluscan class
A)Gastropoda.
B)Pelecypoda.
C)Polyplacophora.
D)Aplacophora.
E)Cephalopoda.
Q16: The space between the mantle and foot
Q17: The shell of a mollusc is secreted
Q18: There are roughly _ described species in
Q19: The inner layer of the mollusc shell
Q20: The rasping structure occurring in the mouth
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