Paleozoic Era: Cambrian to Ordovician Periods
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Paleozoic Era: Cambrian to Ordovician Periods

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Questions and Answers

What is the approximate duration of the Paleozoic Era in million years?

  • 251mya
  • 541-251mya (correct)
  • 541mya
  • 290mya

    • Which period is characterized by the sudden diversification of metazoan?

  • Ordovician Period (correct)
  • Silurian Period
  • Devonian Period
  • Cambrian Period

    • What percentage of all marine species became extinct during the Permian Period?

  • 75%
  • 50%
  • 96% (correct)
  • 90%

    • What is the name of the first vertebrate to appear in the fossil record?

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

    In which period did the first bird appear?

    <p>Jurassic Period</p> Signup and view all the answers

    What is the approximate duration of the Mesozoic Era in million years?

    <p>65-248mya</p> Signup and view all the answers

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