[Campbell Biology P.737] Which of the following phyla is correctly matched with one of its d... | Practice Question

Which of the following phyla is correctly matched with one of its distinctive features?

  • A: Brachiopoda: Characterized by a 'hairy belly' ventral surface.
  • B: Nemertea: Possesses a closed circulatory system with blood contained in vessels.
  • C: Ectoprocta: Known for having a unique stalk that anchors them to their substrate.
  • D: Mollusca: All species are protected by a hard shell.

Explanation

According to the text, Nemertea have an alimentary canal and a closed circulatory system in which the blood is contained in vessels. Brachiopods have a unique stalk, Gastrotricha have a 'hairy belly' ventral surface, and while many molluscs have shells, the text states 'in many species is protected by a hard shell', not all.