Final answer:
The bicameral (two) structure of the Commonwealth parliament means it has two chambers, with one representing the people and the other representing different territories or classes. This structure allows for checks and balances and ensures the interests of various groups are represented.
Step-by-step explanation:
The bicameral (two) structure of the Commonwealth parliament means that it has two chambers. One chamber is generally more closely associated with the perspective of the people, while the other chamber represents different territories or classes. For example, in the German parliamentary system, the lower chamber, the Bundestag, is directly elected by the public, while the upper chamber, the Bundesrat, represents the 16 states. The bicameral structure allows for a system of checks and balances within the legislative branch, ensuring that legislation reflects the interests of different groups.