Which process dominates when freshwater fish move upstream?

💡 Explanation

Osmotic water gain will dominate because freshwater fish live in a hypotonic environment, exhibiting passive water influx into the body via osmosis rather than constantly drinking like marine fish. Therefore, they combat overhydration rather than dehydration.

• Which risk increases when a legume crop's root hairs fail to form a proper infection thread?
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• Which risk increases for migrating salmon using swim bladders in rapidly shifting river depths?
• Which outcome reduces CO2 absorption despite ambient increase when stomata close in plant leaves?
• Which benefit to alder trees, especially after clear-cutting, occurs through symbiotic bacteria?