Final answer:
The commonwealth parliament is bicameral, consisting of the House of Representatives and the Senate. Both chambers work together to create and pass laws.
Step-by-step explanation:
The structure of the commonwealth parliament is bicameral, meaning it has two chambers. One chamber is the House of Representatives, and the other is the Senate.
The House of Representatives is composed of members who are directly elected by the people. The number of representatives each state or territory has is based on its population size. The Senate, on the other hand, is composed of senators who are elected to represent each state and territory equally.
Both chambers work together to create and pass laws, with each chamber having its own specific functions and powers.