The observation that most aquatic vertebrates (e.g.fish,penguins,and whales)have streamlined bodies and fins or flippers for steering are a result of

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The presence of streamlined bodies and fins or flippers in aquatic vertebrates is an example of convergent evolution. Convergent evolution occurs when unrelated organisms independently evolve similar traits or adaptations in response to similar environmental pressures. In this case, the pressures of living and moving efficiently in water have led to the development of similar body plans and appendages in diverse groups of aquatic vertebrates.

The Observation That Most Aquatic Vertebrates (E