JAMB Government Past Questions & Answers - Page 109

Socialism is a political and economic theory of social organization which advocates that the means of production, distribution, and exchange should be owned or regulated by the community as a whole.

The salient distinction between the two classes of systems is that, in a presidential system, executive power is constitutionally vested in a single individual (i.e., the president) for a limited number of years, whereas, in a parliamentary system, executive power is vested in the legislature (i.e., parliament, which chooses a prime minister)

One major advantage of a unitary system is that the responsibilities and powers of government tend to be fairly clear-cut. In times of crisis, a clear division of power often results in more swift reactions and assistance than in a form of government where power is divided between multiple government entities.

Judicial review; power of the courts of a country to examine the actions of the legislative, executive, and administrative arms of the government and to determine whether such actions are consistent with the constitution. 

Adjudication is the legal process by which an arbiter or judge reviews evidence and argumentation, including legal reasoning set forth by opposing parties or litigants, to come to a decision which determines rights and obligations between the parties involved. Its the function of the judiciary