Middle School Life Science Quiz
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BIOLOGICAL EVOLUTION: UNITY AND DIVERSITY
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A dog breeder uses selective breeding by choosing only dogs with very short snouts to be parents. Over several generations, the average snout length decreases. Veterinarians report that dogs from the shortest-snout lines have more breathing problems during exercise than dogs from longer-snout lines. Which piece of evidence most clearly shows a limitation (concern) of this selection, while still recognizing the selection outcome?
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