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Card 15 / 34:
Two species of fish had recently undergone sympatric speciation. The males of each species had a different coloring through which the females could identify and choose a partner from her own species. After some time, pollution made the lake so cloudy that it was hard for females to distinguish colors. What might take place in this situation?
It is likely the two species would start to reproduce with each other. Depending on the viability of their offspring, they may fuse back into one species.
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