Many Freshwater Clams Have Specialized,parasitic ___________ Larvae

Q8: The pulmonate snails lack gills,and their mantle

Q9: The mantle cavity in a mollusc houses

Q10: Molluscs with a tubular shell,open at both

Q11: The _ is the outer layer of

Q12: One group of molluscs in particular,the _,serve

Q14: Torsion in gastropods caused the mantle cavity

Q15: The muscles which hold the valves of

Q16: The circulatory system of cephalopods is more

Q17: Chitons have eight plates embedded in their

Q18: Locomotion in most of the Bivalvia is