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Fred Fred
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Posts: 717
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6 years ago
Fresh water vertebrates
 a. are hyper-osmotic regulators.
  b. produce large volumes of hypotonic urine.
  c. maintain lower internal osmolarities in order to minimize water intake.
  d. are adapted to take in ions of sodium, chlorine and calcium by means of gills, chloride cells and moist skin.
  e. all these.
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6 years ago
E
Fred Author
wrote...
6 years ago
Now I'm convinced to ask more questions Slight Smile
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