A) bilateral symmetry and exoskeleton
B) a mantle and gills
C) shell and non-segmented body
D) a mantle and non-segmented body
Correct Answer: B
Solution :
Mantle is the part of the epidermis of a mollusc, which secretes the shell and covers the dorsal and lateral, surfaces. In molluscs, respiration is carried out by the gills or pulmonary chambers.
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