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ARC-Easy / AKDE&ED_2008_8_20 / What is a primary role of decomposers in an ecosystem?

Problem

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question

What is a primary role of decomposers in an ecosystem?

choices

  • They eliminate matter by taking nitrogen from the ecosystem.
  • They eliminate matter by taking phosphorus from the ecosystem.
  • They cycle matter by returning carbon and other matter to the ecosystem.
  • They cycle matter by returning oxygen and other matter to the ecosystem.

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