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 variations
B) slight, continuous fluctuations
C) slight variations, but only when the external salinity is changing rapidly
D) a cyclic variation identical to that of the surrounding water