Chordata and Chaetognatha Quiz
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Questions and Answers

What is the primary diet of Chaetognatha species?

  • Small fish
  • Plankton
  • Plant matter
  • Copepods (correct)

    • Which anatomical feature is NOT present in the posterior region of Chaetognatha?

  • Tail fin
  • Spines
  • Circular musculature (correct)
  • Segmented body

    • In which geological period did the Chaetognatha originate?

  • Jurassic
  • Ordovician
  • Cambrian (correct)
  • Devonian

    • Which characteristic is NOT associated with Chordata?

    <p>Tripartite coelom</p> Signup and view all the answers

    How many species of Chaetognatha are approximately recognized?

    <p>190</p> Signup and view all the answers

    Which of the following statements regarding the phylogenetic position of Chaetognatha is true?

    <p>Their relationship to rotifers and protostomes is suggested by Hox gene analysis.</p> Signup and view all the answers

    What feature is characteristic of the subphylum Pterobranchia?

    <p>Unique larval morphology</p> Signup and view all the answers

    Which of the following groups is classified within the Deuterostomia subgroup of the Chordata?

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

    What does the 'Posición filogenética incierta' refer to?

    <p>Uncertain phylogenetic position</p> Signup and view all the answers

    Which structure is indicative of the relationships displayed in the phylogenetic tree of Chordata?

    <p>Dorsal nerve cord</p> Signup and view all the answers

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