[Campbell Biology P.998] Which statement accurately distinguishes between types of circulato... | Practice Question

Which statement accurately distinguishes between types of circulatory systems or describes a key component of the vertebrate circulatory system as presented in the text?

  • A: In an open circulatory system, hemolymph directly bathes the organs.
  • B: Vertebrates exclusively possess a single-chambered heart to pump blood.
  • C: Capillaries are responsible for returning blood from tissues to the heart.
  • D: A gastrovascular cavity is an adaptation for efficient long-distance transport in complex animals.

Explanation

The text explicitly states under 'CONCEPT 42.1' that 'Arthropods and most molluscs have an open circulatory system, in which hemolymph bathes organs directly.' This directly supports option A. Options B, C, and D are contradicted by the information provided about vertebrate hearts two- to four-chambered , the roles of capillaries and veins, and the function of gastrovascular cavities.