Simplify the following text for a Grade 16 native English-speaking person.
Original: The governor general summons and appoints each of the 105 members of the upper house on the advice of the Prime Minister of Canada , while the 308 members of the lower house are directly elected by eligible voters in the Canadian populace , with each Member of Parliament representing a single electoral district .
Simplified: The governor general summons and appoints each of the 105 members of the upper house on the advice of the Prime Minister of Canada , while the 308 members of the lower house are directly elected by Canadian voters , with each Member of Parliament representing a single electoral district .