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Questions and Answers
When did the earliest direct evidence of life on Earth appear?
When did the earliest direct evidence of life on Earth appear?
- 4.54 billion years ago
- 4.5 billion years ago
- 3.465 billion years ago (correct)
- 3.42 billion years ago
How old are the fossilized microorganisms found in hydrothermal vent precipitates believed to be?
How old are the fossilized microorganisms found in hydrothermal vent precipitates believed to be?
- 4.5 billion years old
- 4.28 billion years old
- 3.77 billion years old
- 3.42 billion years old (correct)
When did the origin of life on Earth possibly occur?
When did the origin of life on Earth possibly occur?
- 3.77 billion years ago
- 3.42 billion years ago
- 4.28–4.45 billion years ago (correct)
- 4.54 billion years ago
How far does the Earth's biosphere extend into the atmosphere?
How far does the Earth's biosphere extend into the atmosphere?
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Where is the earliest known life in the universe found?
Where is the earliest known life in the universe found?
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