Final answer:
The structure of Congress has both remained the same and changed since the First Congress convened. One way it has remained the same is its bicameral structure, which consists of the House of Representatives and the Senate. However, the number of members in each chamber has changed and the way members of the Senate are selected has also changed.
Step-by-step explanation:
The structure of Congress has both remained the same and changed since the First Congress convened. One way it has remained the same is its bicameral structure, which consists of the House of Representatives and the Senate. This structure was established by the Great Compromise of 1787 and is still in place today.
However, the number of members in each chamber has changed. The House of Representatives has more than four times more members than the Senate, and the number of representatives apportioned to each state changes based on the population of the United States. In addition, the way members of the Senate are selected has changed with the passing of the 17th Amendment, which now allows for direct election by the people rather than selection by state legislatures.
Overall, while the basic structure of Congress has remained intact, there have been changes in terms of the number of members and the selection process of senators.