The best definition of unicameral is a government with one legislative body, hence the word "uni". The United States had a unicameral type of legislature but was later changed because all the states had the same number of representations, even though a state has a low or high amount of population. The United States changed from a unicameral to a bicameral legislature, which is composed of the Senate and the House of Representatives.
To give the United States the power of self-government. While it was a power move to make it evident to Britain that they wanted freedom, it was more so based off the fact that they realized they wanted to have their own system instead of working under Britain’s harsh ruling.
The Convention is the Constitutional Convention of 1787 and the person taking the notes was James Madison. These are known under the name of Notes of Debates in the Federal Convention of 1787 .
They brought horses back to Europe.. I don't know!