Muscles responsible for closing the bivalve shell are
A) longitudinal.
B) adductors.
C) retractors.
D) circular.
E) protractors.
Correct Answer:
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Q8: Which of the following is not a
Q9: The body of molluscs is divided into
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
Q14: Snails,slugs,and limpets belong to the molluscan class
A)Gastropoda.
B)Pelecypoda.
C)Polyplacophora.
D)Aplacophora.
E)Cephalopoda.
Q15: The oldest part of the bivalve shell
Q16: The space between the mantle and foot
Q17: The shell of a mollusc is secreted
Q18: There are roughly _ described species in
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