import jpg file into illustrator

Hai Friends
I imported one jpg file into illustrator. I want to remove some unwanted parts, how can I do that. And is there any selection tool like Photoshop.
Where the pen toll paths are saving, is it possible make selection? Like Photoshop pen tool path.
(now only I am learning illustrator, so don’t mistake me.)

Better ask “stupid questions” than make “stupid mistakes”

What you can do is "link" the JPG instead of importing it. When you use the "Place..." function there should be a check box for a "link"ed option.

If the JPG is linked, you can change the original file in Photoshop and when you do the image will be updated in the Illustrator file.

yes this is very useful.thank you.