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ARC-Easy / VASoL_2011_5_16 / A scientist found a fossil of an organism that had gills. When the organism was…

Problem

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question

A scientist found a fossil of an organism that had gills. When the organism was living, the area in which it lived was most likely covered by ___.

choices

  • forest
  • grassland
  • bare rock
  • water

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Source and history

Official source

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