Some Prosobranchs Have Only One _____________ in Their Mantle Cavity

Question

Some prosobranchs have only one _____________ in their mantle cavity.
A)Shell
B)Foot
C)Gill
D)Radula
E)Tentacle

Accepted Answer

The mantle cavity in prosobranchs contains gills which are used to extract oxygen from the water. Some prosobranchs have only one gill in their mantle cavity while others may have multiple gills. The other options listed are structures commonly found in mollusks, but they may not necessarily be the only structure found in the mantle cavity of prosobranchs.