A unicameral legislature has only one house, which means that all legislative functions are carried out by a single body. This is in contrast to a bicameral legislature, which has two houses. In a unicameral legislature, laws are proposed, debated, and voted on by a single group of legislators. The advantage of a unicameral legislature is that it is usually less expensive to operate than a bicameral legislature, and it can be more efficient in passing legislation because there are fewer stages for a bill to pass before it becomes law.