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emalay516 emalay516
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6 years ago
Productivity is the amount of carbon fixed by organisms through the synthesis of organic matter using energy derived from ________ and ________.
 
  A) hydrothermal, available nutrients
  B) chemosynthesis, hydrothermal
  C) chemosynthesis, photosynthesis
  D) photosynthesis, hydrothermal
  E) none of these
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karlyphilpottkarlyphilpott
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6 years ago
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