[问答题]
Darwin’s finches are a group of
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u 5sw *gff6kpp3:v (bkt)8ukzre shown below.
1.1.Explain the differences in beak shape and size shown in the four individuals A, B, C, D.
1.2.State two possible causes of genetic variation between finches found on the same island.
1.3.Discuss the hypothesis that the finches found on different islands are different species.
2.Species tend to produce more offspring than their environment can support. Explain how this contributes to natural selection.
