Comparative Vertebrate Anatomy Midterm Review Quiz
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Questions and Answers

Which structure is present in all chordate embryos?

  • Dorsal nerve cord
  • Pharyngeal clefts
  • Post-anal tail
  • Notochord (correct)

    • What is a distinctive feature of chondrichthyans?

  • Paired lateral fins
  • Bony plates
  • Mostly cartilaginous endoskeleton (correct)
  • Suspension-feeding mode of nutrition

    • According to one hypothesis, what did the jaws of vertebrates derive from?

  • Notochord
  • Post-anal tail
  • Calcified cartilage
  • Skeletal rods that had supported pharyngeal slits (correct)

    • Which of these characteristics are observed in the common ancestor of chondrichthyans and osteichthyans?

    <p>No jaws</p> Signup and view all the answers

    What is a longitudinal, flexible rod located between the digestive tube and the nerve cord in chordate embryos?

    <p>Notochord</p> Signup and view all the answers

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