(4) Separation of Powers Explanation: In democratic systems of governance based on the trias politjca, a fundamental parallel and a fundamental difference exists between presidential systems and constitutional monarchic parliamentary system of government. The parallel is that the three branches of government (legislative, executive, judicial) exist largely independent of each other, with their own prerogatives, domains of activity, and exercises of control over each other. In presidential systems, the incumbent of the Headof-state is elected to office and, after transfer of power, appoints his administration (like in the United States, with unitary executive) or a government, headed by a prime minister