Imagine an Invertebrate That Lives in an Estuary Where Salinity

Multiple Choice

Imagine an invertebrate that lives in an estuary where salinity varies cyclically with the tides. If this animal practices homeostasis with respect to the salt concentration of its body fluids, its salt concentration will show ________.

A) no fluctuations
B) slight, continuous fluctuations
C) a more concentrated state than the surrounding water at all times
D) a more diluted state than the surrounding water at all times