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Life on earth began in the oceans almost________ years ago.

  1. A
    1 billion
  2. B
    100 million
  3. C
    500 million
  4. D
    3.5 billion

Solution & Step-by-step Explanation

Scientific evidence suggests that life on Earth originated in primeval oceans around 3.5 to 3.8 billion years ago. The earliest forms of life were single-celled micro-organisms (prokaryotes) such as primitive bacteria and cyanobacteria, preserved in ancient fossil formations like stromatolites.

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Life on earth began in the oceans almost________ years ago.
A
1 billion
B
100 million
C
500 million
D
3.5 billion

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BiologyEvolutionEarth Sciences

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