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page 13 of 13 Evolution Versus Natural Selection Quick Check 3 of 53 of 5 Items Question Consider the following scenario: Some fish in a murky underground lake have lighter scales than the others. This makes it slightly harder for the lighter fish to escape detection by predators, but most light-colored fish live long enough to reproduce. A natural event separates the dark-scaled fish from their light-scaled cousins, and as a result, a new species of dark-scaled fish emerges. Which statement accurately describes the scenario? (1 point) Responses The fish survived because of a non-genetic advantage. The fish survived because of a non-genetic advantage. The fish survived because of an inheritable advantage. The fish survived because of an inheritable advantage. The fish experienced an evolutionary change because of genetic drift. The fish experienced an evolutionary change because of genetic drift. The fish experienced an evolutionary change because of natural selection. The fish experienced an evolutionary change because of natural selection. Skip to navigation
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The statement that accurately describes the scenario is: **The fish experienced an evolutionary change because of natural selection.**
In this situation, the lighter-scaled fish had a slight disadvantage in terms of survival due to predator detection, but they were still able to reproduce. Eventually, the separation of the two populations (the dark-scaled and light-scaled fish) led to the emergence of a new species of dark-scaled fish. This indicates that the traits that were advantageous (in this case, darker scales) became more common in the population over time due to natural selection.
In this situation, the lighter-scaled fish had a slight disadvantage in terms of survival due to predator detection, but they were still able to reproduce. Eventually, the separation of the two populations (the dark-scaled and light-scaled fish) led to the emergence of a new species of dark-scaled fish. This indicates that the traits that were advantageous (in this case, darker scales) became more common in the population over time due to natural selection.