Bananas do not keep well, a day maybe two.
Mashed potatoes can be kept in the refrigerator for up to 5-7 days before they spoil.
In light, because in a refrigerator bacteria is less likely to survive as long as outside of a refrigerator
it will be 2weeks
Crab salad should keep safely in the refrigerator for three to four days.
Cauliflower should be safe for 1 week if stored in the refrigerator.
If you mean a cut open fruit, no. Both are slowed with application of lemon juice.
You can keep a fresh turkey in the refrigerator for up to 2 days before cooking it.
How long can you store mashed sweet potato in the fridge
Until it evaporates
about an hour or two.
6 months
1 week