Question Detail
Question
Which type of circulatory system is found in most mollusks, with the exception of cephalopods?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Under 'Phylum Mollusca (Mollusks)', it states: 'Circulatory system: Open circulatory system (except cephalopods like octopus - closed)'. The 'Additional Important Notes' also clarifies 'Open (arthropods, most mollusks) – hemolymph bathes organs directly.'
Hint
Cephalopods are the exception to the general rule for mollusks.