The short answer is that if the united states became a unitary state it would no longer be "united states" but rather the "united state." Perhaps some successor state occupying a portion of what was once the US could be a unitary state, but the likelihood of all the constitute parts of the US voluntarily relinquishing their legislative and administrative prerogative is minute.
Very carefully.
we have NO idea :P
How does the indian government work India follows a parliamentary system of government
By executing its function by parliamentary democratic rules
Generally, a Parliamentary system will get work done quicker, but a Presidential system is sometimes desirable because it partly limits the government.
A quasi federal system means a government which is designed to work as a Federal government in normal circumstances and as an unitary government in an emergency.
The Bangladesh Government (like all other governments in a Parliamentary Democracy) works as per the constitution. They work for the people
The Jamaican government is a parliamentary one. It is headed by a prime minister who is the overall supervisor of the cabinet.
Parliamentary democracy is usually considered to be a good thin, when it works well. When it does not work well, like any government that does not work well, it is not considered to be a good thing.
In a parliamentary democracy. As a member state, Bulgaria like other follow the basic guidelines of the EU
Israel is governed by a multi-party parliamentary system. So basically it's sort of like a democracy.
The government in England, or more correctly the UK today (June 2011) is a coalition between the Conservative party and the Liberal democrats. No party having won an overall majority in the last election.