The difference between the state legislature and the congerss is that the state legislature is state legislature while Congress is national legislature.
A unicameral congress is a legislature consisting of one body, group, or "house", as opposed to a bicameral congress, which has two (and a tricameral congress would have three). (Keep in mind that those words have the same prefixes as unicycle, bicycle and tricycle.)
OK the great compromises legislature was a two house legislature because they took it from the new jersey plan and the Virginia plan and put them together to make one big legislature.
The legislature of the territory and Congress. The territorial legislature can pass a bill asked for statehood, and Congress has to approve the request.
Article one is about congress which is what the US legislature is called. Section 8 of article 1 lists the powers of Congress.
Constitutional amendments are proposed by the Congress.