Read this article by Microsoft, It answers both of your questions I believe.
Click on where it says Can I import PDF content into a PowerPoint presentation?

This is the process that they give for inserting a .pdf into powerpoint.

To insert a PDF into a PowerPoint presentation, do the following:

1. Click the Insert tab.
2. In the Text group, click Object.
3. In the Insert Object dialog box, click Adobe Acrobat Document, and then click OK.
4. Browse to the .pdf file you want to insert, and then click Open.