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Hannah g Hannah g
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Posts: 702
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6 years ago
A pile of castings outside the burrow of a polychaete indicates it
 
  a. has just dug a burrow.
  b. has completed a meal of other worms.
  c. is a filter feeder.
  d. is a selective deposit feeder.
  e. is a nonselective deposit feeder.
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6 years ago
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