If you place it no…if it’s fairly simple artwork and you paste it you will wind up with native InDesign objects.
Yes, now I see that in the help files.
The way to edit an AI file is to right-click the image and select "Edit original"
If it's just some simple objects, I find Bob's suggestion of copying them into InDesign worth the effort. Then again, if you have to edit them at a regular base, InDesign's vector editing tools are slightly less advanced than Illustrator's (admittedly, by a narrow margin; but some things are just a bit easier to do in Illustrator).