Organisms that live in freshwater and marine biomes have developed unique adaptations that aid in their survival. Which of the following adaptations would be more useful for an animal in a marine biome than for an animal in a freshwater biome?

Marine animals are surrounded by salt water, so they need adaptations that help them cope with high salinity. Tolerance to high levels of salinity is therefore more useful in a marine biome than in a freshwater biome. Flippers, smooth bodies, and streamlined bodies can help animals move through water in either biome.

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