they are helpful because they are
Sandpaper is both helpful and harmful.
They are more helpful than harmful. My two gerbils are both helpful. They've helped me in many ways and so that's why I say they're more of helpful than harmful.
Both
both
Both only when it infects it is harmful
They are helpful because they clean out intestines. they are harmful because they can cause diseases
computer.. both helpful and not..
If you need help I recommend you type in the specific question you need help with
Bacteria can be both harmful and helpful. Harmful bacteria can cause diseases in humans, animals, and plants. However, some bacteria are beneficial and play important roles in processes like digestion, nutrient cycling, and decomposition.
a bacillus bacteria
Both. It depends what type of octopus it is.
If they are ecosystem?