The Circulatory System of Cephalopods Is More Efficient Than That

Q2: The characteristics that generally typify molluscs are<br>A)foot,mantle,protonephridia,shell.<br>B)radula,open

Q3: Most cephalopods can secrete and expel an

Q4: Molluscs are important to humans because of

Q5: Opisthobranchs that have no shell or true

Q6: The class Gastropoda is the most diverse

Q7: The nudibranchs belong to the<br>A)ProsobranchiA.<br>B)Opisthobranchia.<br>C)Pulmonata.<br>D)Scaphopoda.

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