A Fish Swimming into an Estuary from a River Would

question 12

Multiple Choice

A fish swimming into an estuary from a river would have which of the following as its greatest physiological challenge?

• A) The high water flow would make the fish expend more energy.
• B) The low oxygen content would give the fish difficulty in swimming aerobically.
• C) The temperature change would stress the fish by denaturing its proteins.
• D) The change in water solute content would challenge the osmotic balance of the fish.

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