Nthe oxidation of pyruvate to acetyl coa, one carbon atom is released as co2. however, the oxidation of the remaining two carbon atoms—in acetate—to co2 requires a complex, eight-step pathway—the citric acid cycle. consider four possible explanations for why the last two carbons in acetate are converted to co2 in a complex cyclic pathway rather than through a simple, linear reaction.

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 ?