Finches that feed on seeds possess compact, powerful beaks -- with larger beaks better equipped to crack larger seed cases. It is the native habitat of a variety of bird species known as Darwin’s finches (subfamily: Geospizinae) Darwin’s finches demonstrate adaptive radiation and show marked variation in beak size and shape according to diet Charles Darwin and the rest of the HMS Beagle crew spent only five weeks in the Galapagos Islands, but the research performed there and the species Darwin brought back to England were instrumental in the formation of a core part of the original theory of evolution and Darwin's ideas on natural selection which he published in his first book . The Galapagos Islands are an archipelago of 13 major islands and more than a hundred smaller islands that straddle the equator off the Ecuadorian coast. Describe how the finches on Daphne Major showed natural selection. Darwin's finches demonstrate adaptive radiation and show marked variation in beak size and shape according to diet. Peter and Rosemary Grant and their colleagues have studied Galápagos finch populations every year since 1976 and have provided important demonstrations of the operation of natural selection. On his visit to the Galapagos Islands, Charles Darwin discovered several species of finches that varied from island to island, which helped him to develop his theory of natural selection. Describe how these two factors resulted in natural selection in the population of ground finches on Daphne Major during drought years. An extended drought changed the frequency of larger beak sizes within the population by natural selection. The Grants found changes from one generation to the next in the beak shapes of the medium ground finches on the Galápagos island of Daphne Major. Daphne Major is a volcanic island that forms part of the archipelago that is collectively referred to as the Galapagos Islands. Finches on Daphne Major show natural selection because when the finches moved to that island, only the ones that had specific beak features where the ones that survived. Studies of Natural Selection After Darwin. Daphne Major. Daphne Major is a volcanic island that forms part of the archipelago, otherwise collectively known as the Galapagos Islands. Demonstrations of evolution by natural selection can be time consuming. After the overproduction of offspring, there is a …

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