No - unless the label states "keep refrigerated" which should mean that it was in the refrigerated case when you purchased it.
Yes, since there are no natural preservatives in pesto, it should be refrigerated.
It might last a little longer than fresh basil leaves that aren't made into pesto would last, but since it's not cooked I wouldn't count on it.
Yes, gravy will go bad if not refrigerated. The pH and water activity are not low enough to make it shelf stable without a canning process.
Of course milk needs to be refrigerated because if you don't refrigerate it, it will get chunky and go bad.
As long as it stays refrigerated, it should not go bad before the expiration date. If it's left out, it should be eaten the same day. Depending on tempertaures, you could go another day, but I personally wouldn't.
No, unless mixed, than it needs refrigerated.
Blackberries do need to be refrigerated, or else they will go bad
All penicillin will go bad after a period of time, but it is actually better to keep liquid penicillin refrigerated. It is a good idea to check the expiration date on your penicillin, and dispose of it when it expires. Penicillin that has gone bad will not help you, and you should be careful with medications that are past their date.
Pesto in Tagalog is still generally referred to as "pesto".
American!!!!
Yes it can spoil with out refrigerated.