Marine bony fishes acquire excess salt when they drink seawater. They handle this salt load by

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Marine bony fishes acquire excess salt when they drink seawater. To handle this salt load, they employ multiple mechanisms such as producing very little urine (b), excreting ions from gills (c), and not absorbing some ions from the gut (d). These mechanisms work together to maintain the osmotic balance in their bodies. Therefore, the best choice is E, which encompasses all the relevant mechanisms.

Marine Bony Fishes Acquire Excess Salt When They Drink Seawater