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Echinoderms Anatomy and Characteristics
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Echinoderms Anatomy and Characteristics

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Questions and Answers

What is the name of the calcareous skeleton developed by echinoderms?

  • Endoskeleton (correct)
  • Chitinous skeleton
  • Exoskeleton
  • Hydroskeleton
  • Where is the anus located in echinoderms?

  • Near the mouth
  • Central body cavity
  • Upper surface (aboral) (correct)
  • Lower surface (oral)
  • Which symmetry is exhibited by echinoderms?

  • Spherical symmetry
  • Radial symmetry (correct)
  • Cuboidal symmetry
  • Bilateral symmetry
  • What kind of system is present in the coelom of echinoderms?

    <p>Water vascular system</p> Signup and view all the answers

    How do motile echinoderm species move?

    <p>Using tube feet</p> Signup and view all the answers

    Which system is poorly developed in echinoderms?

    <p>Nervous system</p> Signup and view all the answers

    What type of fertilization occurs in echinoderms?

    <p>External fertilization</p> Signup and view all the answers

    What is a key characteristic shared between echinoderms and chordates?

    <p>Radial cleavage during embryonic development</p> Signup and view all the answers

    Which of the following echinoderm species exhibits the ability of regeneration?

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

    Why are echinoderms considered simple in structure and placed at the top of the list of invertebrate phyla?

    <p>Striking resemblances to chordates</p> Signup and view all the answers

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