Scientists use a system called binomial nomenclature to classify organisms. for example, the goldfish is known as carassius auratus. each of the two names has a different significance. which of the following correctly describes the meaning of the two names? a. carassius is a distant evolutionary ancestor of the goldfish, while auratus is a more recent species. b. carassius is a group of organisms with similar behavior, while auratus is a group with similar structures. c. carassius is a group of organisms with similar external structures, while auratus is a group with similar internal structures. d. carassius is a group of different organisms with similar structures, while auratus is a smaller group of memebers that can only breed with another auratus.