Species Population Quiz
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Questions and Answers

What is the estimated number of Earth's current species?

  • 5 billion
  • 1,899,587
  • 1 trillion
  • 10 million to 14 million (correct)

    • How many species have been documented out of the estimated Earth's current species?

  • 17,000 per year
  • 20,000,000
  • 1.2 million (correct)
  • 1 trillion

    • What method was used to count the emperor penguin population in 2012?

  • Using the transect method
  • By experts' estimates
  • By census
  • By satellite (correct)

    • What is the estimated number of marine microbial species alone?

    <p>20,000,000</p> Signup and view all the answers

    When did scientists report the estimated number of 1 trillion species on Earth?

    <p>May 2016</p> Signup and view all the answers

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