Class Merostomata Features Quiz
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Questions and Answers

How many eyes does the horseshoe crab have on top of its prosoma?

  • Ten (correct)
  • Five
  • Four
  • Six

    • Which part of the horseshoe crab is often mistaken as a stinger but is actually used for steering and flipping?

  • Telson (correct)
  • Prosoma
  • Chelicera
  • Opisthosoma

    • How many pairs of appendages does the horseshoe crab have on the underside of its prosoma for walking?

  • Five (correct)
  • Two
  • Six
  • Four

    • Which order of Merostomata includes horseshoe crabs like Carcinoscorpius rotundicauda and Tachypleus tridentatus?

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

    How many fossil species from the Paleozoic Era are included in the extinct order Eurypterida of Merostomata?

    <p>200</p> Signup and view all the answers

    What is the function of the telson on a horseshoe crab?

    <p>To steer and flip the crab</p> Signup and view all the answers

    Which body segment of the horseshoe crab is covered by a dorsal carapace?

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

    How many pairs of appendages does the horseshoe crab have on the underside of its prosoma for walking?

    <p>Five pairs</p> Signup and view all the answers

    Which order of Merostomata includes the extinct Gigantostraca, with 200 fossil species from the Paleozoic Era?

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

    What is the primary purpose of the chelicera in a horseshoe crab?

    <p>Moving food into the mouth</p> Signup and view all the answers

    How many body segments are present in a horseshoe crab?

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

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