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Johnni Johnni
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6 years ago

Which condition of early Earth contributed to biosynthesis?
  a. oxygen-depleted atmosphere
  b. ozone in the upper atmosphere
  c. oxygen in the atmosphere
  d. extreme high temperatures
  e. aerobic conditions

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tysonrastysonras
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6 years ago
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Johnni Author
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6 years ago
You make an excellent tutor!
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Smart ... Thanks!
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Correct Slight Smile TY
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