Charles Darwin, an English naturalist and explorer, began a five-year 81. ____ in December 1831 on a ship called the Beagle. The expedition reached Bahia in Brazil in the spring of 1832. Darwin was 82._____ by the number and dazzling colors of the flowers and birds he saw. The Beagle then sailed south along the coast of Patagonia where the crew discovered the fossil remains of several 83._____ animals. In September 1835, the expedition reached the remote Galapagos Islands. There Darwin saw birds, animals, and plants that are found nowhere else on earth because they had 84.______ in isolation from their relatives in America. They were to play an important part in Darwin’s theories on how animals and humans 85._______. (Discovery, Everett, Reid, and Fara)