Match the Missing Words in the Following Phrase

Short Answer

Match the missing words in the following phrase. Darwin's finches developed different beak shapes and sizes on different islands. The original bird [A] that colonized the islands was genetically [B]. This meant that, although birds in the original population were [C], individual birds had slightly different beaks. Food sources differed between islands. Birds with beaks that were better suited to obtaining food on a particular island had [D] survival and reproduction rates, and the number of birds with suboptimal beaks [E] relative to the number of birds with well-suited beaks. Over evolutionary time, the beak shape became fixed in each [F].