Cooking it covered will cook it faster as it keeps the heat in the food, and if your cooking meats will help to keep the juices in. Uncovered foods will bake faster on the outside possibly buring before the inside gets fully cooked.
You should try to cover it even if just partly to avoid spillage
it depends what food it is, like garlic bread it will burn in no time if you dont cover it!
when food is uncovered for a long time micro organisms adapt the food which causes damage to our health. in covered food micro organisms cannot occupy it
Flies and bees will both sit on uncovered food. Food should always be covered especially when outside in the elements.
Refrigerated food should be covered to keep it from drying out and to keep odors from mingling in the fridge. Only if you want the food to dry out (like aging beef) should it be uncovered. Food in a pantry or cupboard should be covered to keep out dust or insects.
One reason to use a covered pan is so there is not any splatter. Using a lid on a pan also helps the food cook faster.
cook, chef?
no
Petition for a new chef/cook.
No, but most foods taste better cooked.
it is not healthy
It rots.
Yes, if you cook them correctly. But elephants taste better :D