Livcannon
Livcannon Livcannon
  • 01-02-2017
  • Biology
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Cyanobacteria which first appeared on earth over 3 billion years ago are

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kev2002 kev2002
  • 02-02-2017
Cyanobacteria also known as one of the first organism on earth are responsible for producing nearly 80% of the oxygen on earth.
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