Evolution of Life on Earth
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Questions and Answers

What is the estimated age of the universe?

  • 4.6 billion years (correct)
  • 5.5 billion years
  • 3.5 billion years
  • 2.5 billion years

    • What was the common ancestor of all life forms on Earth?

  • Aerobic
  • Prokaryotic (correct)
  • Eukaryotic
  • Multicellular

    • What type of cell must the ancestral cell have been, considering the scarcity of oxygen on the early Earth?

  • Aerobic
  • Eukaryotic
  • Anaerobic (correct)
  • Multicellular

    • What does 'anaerobic' mean?

    <p>Without Oxygen</p> Signup and view all the answers

    What is the focus of the lesson objectives mentioned in the text?

    <p>History of life on Earth</p> Signup and view all the answers

    What is the estimated age of the universe?

    <p>4.6 billion years</p> Signup and view all the answers

    What was the common ancestor of all life forms on Earth?

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

    What does 'anaerobic' mean?

    <p>Without Oxygen</p> Signup and view all the answers

    What did the scarcity of oxygen on the early Earth imply about the ancestral cell?

    <p>It was anaerobic</p> Signup and view all the answers

    What is the focus of the lesson objectives mentioned in the text?

    <p>Recognizing the importance of knowing the history of life on Earth</p> Signup and view all the answers

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