37 The occurrence of different beak shapes for the finches living on different islands of the Galapagos suggested what principle to Darwin? Select an answer and submit. For keyboard navigation, use...

Extracted text: 37 The occurrence of different beak shapes for the finches living on different islands of the Galapagos suggested what principle to Darwin? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a allelic heterogeneity b the role of mutations in phenotypic variation the principle of natural selection d. the founder effect