Osmoconforming Sharks Take in Water, as Needed

Question

Osmoconforming sharks take in water, as needed,
A) by migrating to freshwater rivers to drink fresh water.
B) via osmosis, as their body cells are slightly hyperosmotic to seawater.
C) via active transport of water across the cells on their gills.
D) by water diffusion from seawater, which is hyperosmotic to the fluids in their cells.
E) by selective transport of water molecules across the wall of the gut.

Accepted Answer

Osmoconforming sharks have slightly hyperosmotic body cells compared to seawater. They do not actively transport water or migrate to freshwater rivers to drink fresh water, nor do they selectively transport water molecules across the wall of the gut. They passively take in water by osmosis from seawater, which is hyperosmotic to the fluids in their cells.