Which of the following list of features describes the molluscs and bivalves but not the annelids?

Question

Quizplus · Accepted Answer

Molluscs and bivalves both have a muscular foot and a mantle, which are not found in annelids. They may also possess a hard outer shell and have a complete digestive system. However, they lack cephalization, which is present in annelids. Therefore, option A is the correct choice. Option B is incorrect because it mentions the presence of cephalization, which is not a characteristic feature of molluscs and bivalves. Option C is incorrect because it mentions circular muscles, which are more commonly found in annelids than in molluscs and bivalves. Option D is incorrect because not every member of the group will have a hard outer shell. Finally, option E is incorrect because there is at least one choice that describes the molluscs and bivalves but not the annelids.

Which of the Following List of Features Describes the Molluscs