Final answer:
In saltwater, hypertonic conditions can cause dehydration due to osmotic effects. Some marine organisms have evolved osmoregulatory mechanisms to cope with different salinity levels.
Explanation:
Hypertonic conditions in saltwater lead to osmotic issues for individuals. The high salt concentration in seawater compared to bodily fluids causes water to be drawn out from cells, leading to dehydration. Organisms like some fish have evolved osmoregulatory mechanisms to survive in various aquatic environments, helping them maintain osmotic balance.
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