"Scientists now routinely utilize the genetic information in biological macromolecules—proteins and DNA—to address numerous aspects of the behaviors, life histories, and evolutionary relationships of organisms. When used to best effect, molecular data are integrated with information from such fields as , , , , and paleontology. These time-honored biological disciplines remain highly active today, but each has been enriched if not rejuvenated by contact with the relatively young but burgeoning field of molecular evolution."