To make sure that no one house gets too powerful and overthrows the nation.
ADDED: More clarification is needed to determine WHAT COUNTRY is being asked about. (for example: The U.S. only has TWO houses of the Legislative Branch.)
three.. :) ..
The Volk can be divided into three main groups, "a supporting, a leading and a creative class."
upper (aristocrats), middle (nobles), and lower (commoners).
When the Aryans first entered India, they were divided in three social classes, the warriors, the priests and the common people.
Land owners, free people who did not own land, and slaves
The congress is only divided into two parts. This is the House of Representatives and Senate. There are 435 people in the House and 100 in Senate.
The early Romans were divided into two classes because of their wealth, just as people today are divided into groups or classes due to wealth.
3 classes
Organisms that are divided into classes are called classifying organisms or classified organisms.
The vertebrates are further divided into five groups or classes.
France was divided into one of three social classes or estates
Hallucinogens are typically divided into three classes: psychedelics, dissociatives, and deliriants. Note that some substances are difficult to classify and may be included in more than one class.