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ggull329 ggull329
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7 years ago

A group of Pennsylvanian to Permian reptiles that possessed some mammal-like characteristics;
  many of these reptiles had large fins on their backs:a.
   chordates d. gymnosperms
  b. pelycosaurs e. archaeocyathids
  c. placoderms
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dalenambawandalenambawan
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