Crantz;

The Governor General is the Queen's agent and can be dismissed by the
Queen(or King). The PM is selected by the governing party and does need
Gov. Generals approval; I do believe.

http://community.webtv.net/tassail/ThomPage

Here you go Thom:

http://en.wikipedia.org/wiki/Gough_Whitlam


Whitlam was a whacko and set Australia back several hundred years.