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Type: Multiple-Choice
Category: Biogeochemical Cycles
Level: Grade 9
Score: 3
Author: decalvil802
Last Modified: a year ago

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Biogeochemical Cycles Question

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Grade 9 Biogeochemical Cycles

In an ecosystem, bacteria that inhabit the roots of certain plants and soil play an essential role in cycling
  1. carbon dioxide.
  2. nitrogen.
  3. oxygen.
  4. phosphorus.
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