cause sleeping sickness
they harm the plants
it is harmful at one side and useful at the other side.
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.
protozoa can cause harmful diseases and effect plants life.
it is useful because it can aware all the peoples to now about it and also to protect or environment to such harmful effects
Useful effects of electrolytes include maintaining proper hydration and fluid balance, supporting nerve and muscle function, and regulating blood pressure. Harmful effects can occur if there is an imbalance of electrolytes, leading to symptoms such as muscle cramps, weakness, irregular heartbeat, and confusion.
It don't do anything
lion are useful and harmful
It is not harmful. Also it is not useful
The changes talking place in our surroundings and which are useful to us are called Useful changes. The changes which are not useful but harmful are called Harmful changes
harmful effects of coelenterates
Generally indigestion tablets are not harmful but useful. But excess of use or some other health problems of some individuals can lead to harmful effects. See the link below.