he main digestive function of the stomach is ___. Select one: A. destroying bacteria with gastric acid B. secretion of intrinsic factor C. chemical digestion of fat D. chemical digestion of proteins

Charles Darwin made important contributions in evolution of organisms. He came up with theories and evidences of organic evolution and stated that all organisms had a common ancestry origin. He made three important observations during his voyage of the beagle which include, the diversity of living things, the remains of ancient organisms and the characteristics of organisms on the Galapagos island.