Question Detail
Question
This is an organism that possess an opened circulatory system.
Correct Answer
Option B is the correct answer.
Detailed Explanation
Molluscs (like snails and clams) generally have an open circulatory system where blood is pumped into a hemocoel (body cavity) and surrounds the organs, rather than being contained entirely within vessels. Cows, birds, and fish are vertebrates, which all possess closed circulatory systems.
Hint
Think about which of these animals is an invertebrate, as open circulatory systems are characteristic of many invertebrates.