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jessiecraane jessiecraane
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6 years ago
The oldest fossilized remains of organisms are primitive ________ bacteria recovered from rocks formed on the sea floor about 3.5 billion years ago.
 
  A) photosynthetic
  B) chemosynthetic
  C) heterotrophic
  D) streptococcus
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6 years ago
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jessiecraane Author
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6 years ago
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