Question

For class Cephalopoda, which of the following statement is incorrect?

• A. Head distinct and large with well developed eyes, foot as tentacles with siphon
• B. Dioecious, development direct
• C. Shell external internal or absent
• D. Marine and sedentary

Answer 1

Answer: (D)

Marine and sedentary

Cephalopods are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles modified from primitive molluscan foot. Cephalopods are dioecious and generally metamorphosis is the usual state in molluscs of development into adult form, the cephalopods differ in exhibiting direct development. The shell is external in some like nautiluses and internal in many other molluscs. Cephalopoda is a class in the phylum Mollusca which are exclusively marine animals but they can move with their tentacles and are not sedentary.
Thus, the correct answer is option D.