The significant to darwin about the fauna and the flora of the galápagos islands is The species were similar to the South American species, indicating the common descent, but they had been the extensively modified and were well-adapted to the island life
in Galapagos he found a remarkable population of the plants, birds and the reptiles that had been developed as isolation from the mainland, but they often differed on the almost identical islands next door to one of another and whose characteristics that he could only explain by the gradual transformation of the various species. Over time, the Darwin began to wonder if the species from the South America that had reached the Galapagos and then he changed as they had adapted to new environments. This idea—that species and that could be change over the time—eventually this led to Darwin's theory of evolution by the natural selection
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