Chambers of parliament
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|Legislatures by country|
Many parliaments or other legislatures consist of deliberative assembly in two legislative chambers  (or houses): an elected lower house, and an upper house or Senate which may be appointed or elected by a different mechanism from the lower house. This style of two houses is called bicameral. Legislatures with only one house are known as unicameral.
The lower house is almost always the originator of legislation, and the upper house is the body that offers the "second look" and decides whether to veto or approve the bills. In the United Kingdom legislation can be originated in either house, but the lower house can ultimately prevail if the two houses repeatedly disagree. In most countries the lower house, regarded as more particularly the representatives of the people, has sole or predominant control over matters to do with finance and taxation.
A parliament's lower house is usually composed of at least 100 members, in countries with populations of over 3 million. The number of seats rarely exceeds 400, even in very large countries. Among the countries with large lower houses are France, where the National Assembly has 577 members, and Japan, where the House of Representatives has 475 members. The upper house of a parliament customarily has anywhere from 20 to 200 seats, but almost always significantly fewer than the lower house. In the United Kingdom however, the lower house (the House of Commons) has 650 members, but the upper house (the House of Lords) currently has slightly more members than the lower house, and at one time (before the exclusion of most of the hereditary peers) had considerably more.
Merging of chambers
Until 1953, the Rigsdag in Denmark was similarly divided into the "Folketing" and "Landsting", but has since become a unicameral legislature. The same goes with Sweden and its "Riksdag" until 1971. The Norwegian parliament (Storting) was officially divided in two chambers 1814–2009, but functioned as a single chamber in practice, a situation called Qualified unicameralism.
Floor and committee
The floor is the name for the full assembly, and a committee is a small deliberative assembly that is usually subordinate to the floor. In the United Kingdom, either chamber may opt to take some business such as detailed consideration of a Bill on the Floor of the House instead of in Committee.
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- Legislative Organization & Procedures. The National Conference of State Legislatures. www.ncsl.org. Retrieved June 29, 2013.
- UK Parliament Glossary, http://www.parliament.uk/site-information/glossary/floor-of-the-house/, accessed 1 July 2015