Final answer:
The Roman Senate served as an advisory body in the Roman Republic and held significant power over the Roman Empire. It consisted of aristocratic administrators and had the authority to decide how public money was to be spent.
Step-by-step explanation:
The Roman Senate served as an advisory body in the Roman Republic. It was not composed solely of common citizens, but rather consisted of aristocratic administrators who controlled state finances. Senators were not appointed for life, as their term in office was limited. The Senate held significant power over the Roman Empire, deciding how public money was to be spent and advising elected officials.