Refer to fi gure 57.7. Examine the pattern of beak size distributions of two species of fi nches on the Galápagos Islands. One hypothesis that can be drawn from this pattern is that character...

Refer to fi gure 57.7. Examine the pattern of beak size distributions of two species of fi nches on the Galápagos Islands. One hypothesis that can be drawn from this pattern is that character displacement has taken place. Are there other hypotheses? If so, how would you test them?

Figure 57.7