Evolution of Life on Earth

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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?

Without Oxygen Signup and view all the answers

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

History of life on Earth Signup and view all the answers

What is the estimated age of the universe?

4.6 billion years Signup and view all the answers

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

Prokaryotic Signup and view all the answers

What does 'anaerobic' mean?

Without Oxygen Signup and view all the answers

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

It was anaerobic Signup and view all the answers

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

Recognizing the importance of knowing the history of life on Earth Signup and view all the answers

Evolution of Life on Earth

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Questions and Answers

What is the estimated age of the universe?

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

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

What does 'anaerobic' mean?

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

What is the estimated age of the universe?

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

What does 'anaerobic' mean?

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

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

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