The shapes that do not directly exist are very few. There are mostly all the shapes in Shapes column in insert.
shapes Gallery
shapes
The Shapes button is located within Insert tab (or even the Home tab) of the Ribbon.
Drawing
For Powerpoint 2007: Insert --> Shapes --> Callouts... pick a speech bubble. Type the text into the space provided.
Yes it can be.
25
yes they exist in shapes
Graphics can refer to any photos, drawings, shapes or any of the built-in elements that Powerpoint provides, like flow chart elements etc.
Because we say they do.
Flash videos can be played from inside PowerPoint. However, a flash video capable player must exist on the computer or PowerPoint cannot play them.
shapes