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 (B)</p>
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What is the focus of the lesson objectives mentioned in the text?

<p>History of life on Earth (D)</p>
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What is the estimated age of the universe?

<p>4.6 billion years (D)</p>
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What was the common ancestor of all life forms on Earth?

<p>Prokaryotic (C)</p>
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What does 'anaerobic' mean?

<p>Without Oxygen (D)</p>
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What did the scarcity of oxygen on the early Earth imply about the ancestral cell?

<p>It was anaerobic (C)</p>
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What is the focus of the lesson objectives mentioned in the text?

<p>Recognizing the importance of knowing the history of life on Earth (A)</p>
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