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?
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Responses
The fish experienced an evolutionary change because of natural selection.
The fish experienced an evolutionary change because of natural selection.
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.
1 answer
The statement that accurately describes the scenario is:
The fish experienced an evolutionary change because of natural selection.
This is because the lighter-scaled fish had a slight disadvantage in escaping predators, which suggests that the darker-scaled fish would have a better chance of survival and reproduction in that environment. Over time, this leads to the emergence of a new species of dark-scaled fish due to the selective advantage of the darker coloration.
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