no
No
Teeth get discolored from the food that you eat and the things that you drink. Almost everything you eat or drink is a color and over time that can stain your teeth, this is why brushing is so important.
I don't know for sure, but I don't suggest you try it. Better be safe than sorry. For a treat, opt for some apples or a carrot :)
If you have to ask, don't eat it.
Zebras
technically..yes
No, any food left unrefrigerated over two hours has begun to acquire bacteria and is contaminated. It would not be safe to eat.
The eggplant is a bush. We eat the aubergines that grow on it. Aubergines are vegetables.
eggs eggplant
Same reason anything else turns discolored when they die. Their cells are dead and discolored.
eggplant, elderberry