No
does squash spoil if left overnight or two days
No.
no
They may be unsafe to eat if left out overnight and should be thrown out.
The old basil did not possess much potency any more, after being left on the kitchen counter for months.
No. It is not safe to eat turkey left out overnight in any container.
No, it may not be safe to eat after being left out overnight.
No. Stew left out overnight would not be safe to eat, covered or not - unless where it was left out was as cold as a refrigerator.
No.
It wouldn't be safe to eat salad that's been left out overnight.
I have done this for years and never had a problem. I have left cheese out overnight and used it. It was fine. That will depend upon the type of cheese and the available microbes - which are unknowns. If the cheese is a type that should be refrigerated, it should not be left out overnight and then consumed, regardless of whether or not it is cooked.
No, it is not safe to eat if it has been left out overnight.