The first cellular life appeared on Earth about ......... years ago.

  • A
    $2000$ billion
  • B
    $2000$ million
  • C
    $4000$ billion
  • D
    $4000$ million

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Similar Questions

Explain the Oparin-Haldane theory regarding the origin of life.

Which of the following experiments suggested that the simplest living organisms could not have originated spontaneously from non-living matter?

What was the final product of Miller's experiment?

Simple one-celled cyanobacteria-like organisms appeared on Earth:

Which amino acid was not formed in Miller's experiment?

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