The characteristics that generally typify molluscs are
A)foot,mantle,protonephridia,shell.
B)radula,open circulation,mantle,shell.
C)coelom,mantle,closed circulation,radula.
D)no anus,pseudocoel,mantle,shell.

Question

Quizplus · Accepted Answer

The features that generally typify molluscs are the presence of a radula for feeding, open circulation, a mantle that covers the body, and a shell that may be present or absent depending upon the species. A is incorrect because protonephridia are not a unique feature of molluscs, while the foot is a characteristic of gastropods and bivalves but not all molluscs. C is incorrect because molluscs have an open circulatory system, whereas closed circulation refers to the circulatory system found in vertebrates. D is incorrect because molluscs do have an anus, and the presence of a pseudocoel is a characteristic of some but not all invertebrates.

The Characteristics That Generally Typify Molluscs Are