Which describes a difference between cephalopods and gastropods?
O Cephalopods have a water vascular system, and gastropods have an open circulatory system.
O Cephalopods live only in ocean environments, and gastropods live in a variety of environments.
O Cephalopods have a simple nervous system, and gastropods have a complex nervous system.
O Cephalopods are the largest group of mollusks, and gastropods are the smallest group of mollusks.