What was unique about the system of banks established by the Medici family?

Dante’s Divine Comedy represents

Genoese trading colonies in the western Mediterranean were based upon

Cybernetic theory tells us that “variety” is a measure of the number of different states a system can be in. It also tells us that anything that aims to be a regulator of a system must have at least as much variety as the system it is trying to regulate. What name is this proposition known by?  

In Jay Forrester’s system dynamics framework, which component represents the accumulations within a system that provide it with ‘memory’ and define its state at any given time?

According to the Krippendorff reading, deviation-amplifying feedback in social systems is always destructive. 

The thymus is most active in adolescents and young adults.

The leukocyte that is usually the first to arrive at the site of infection, is a granulocyte and is a phagocyte is a _______________.

Which of the following is NOT a potential cause of metabolic alkalosis?

Which of the following is part of the lower respiratory system?