A fever heats up your internal temperature to kill of virus' in your body so it is good.
If you need help I recommend you type in the specific question you need help with
There are many, many types of bacteria. They can be both harmful and helpful to us. Also, even if there were to be helpful in a certain part of the body they may also be a pathogen in another.
Paramecium cilia are little hairs around its body that can make it move in different directions. It is beneficial to the paramecium to get food (bacteria) and there are no harmful effects.
it can be helpful or harmful
No. It is helpful and if you don't do it, the body will do it on it's own.
sometimes they are helpful and harmful.
Bacteria can be both harmful and helpful
Sandpaper is both helpful and harmful.
Can be both harmful and helpful. They can be harmful to humans because, many types of amoebas can carry diseases, and some can feed on human tissue. They can get into our body by, contaminated food and contaminated water. Amoebas are also helpful because they are part of the food chain.
they are helpful not harmful to plants
harmful
Depends on what part of "harmful" or "helpful" you are referring to.