Phylum Chordata: Anatomy, Physiology, and Evolution
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Questions and Answers

Which of the following is a characteristic of vertebrates?

  • Absence of a vertebral column
  • Presence of a notochord
  • Post-anal tail during development (correct)
  • Lack of pharyngeal slits

    • What is the defining feature of invertebrate chordates?

  • Dorsal hollow nerve cord
  • Vertebral column
  • Notochord (correct)
  • Absence of pharyngeal slits

    • Which class of chordates includes organisms with the characteristic of housing and protecting the spinal cord?

  • Birds (Aves)
  • Reptiles (Reptilia)
  • Fish (Fish) (correct)
  • Amphibians (Amphibia)

    • During which period did the phylum Chordata originate?

    <p>Cambrian period</p> Signup and view all the answers

    What is the function of the notochord in chordates?

    <p>To provide initial skeletal support and maintain body shape</p> Signup and view all the answers

    What is the composition of the dorsal hollow nerve cord in chordates?

    <p>Outer covering called ectoderm and inner covering called endoderm</p> Signup and view all the answers

    What do the pharyngeal slits in chordates eventually give rise to?

    <p>Gill slits in vertebrates and other derivatives in invertebrate chordates</p> Signup and view all the answers

    What is a common feature of respiratory systems in chordates?

    <p>Adaptation to specific environments</p> Signup and view all the answers

    What is a key component of the nervous system in chordates?

    <p>A brain, spinal cord, and peripheral nerves</p> Signup and view all the answers

    What determines whether chordates have an endoskeleton or exoskeleton?

    <p>Their class</p> Signup and view all the answers

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