Biochemical similarities exist among organisms and indicate relationships. These biochemical characteristics are studied using * a. observations of plant and animal behavior b. fossil records c. observations of various cells under a microscope d. DNA sequences and amino acid studies

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?