JAMB - Government (2013 - No. 11)
The presidential system differs from the parliamentary system of government in that
The principle of collective responsibility applies
Executive and legislative powers are fused
Powers of the three arms of government are merged
The tenure of office of the president is limited
Explicació
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)