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they are helpful not harmful to plants
If it is harmful it will not survive long
Harmful: Winds can destroy structures. Helpful: Winds can power windmills.
a cicada is harmful because they take pollen from plants
Depends.. 95% of all microorganisms are helpful. Most protists are usually helpful.
A harmful environment is one where there is some agent or condition in the environment that may cause impaired health or disease to people, plants or animals or that may damage people, plants, animals, property or other elements of the environment.
Harmful.
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Help us to breath.
yes they kill more harmless insects than harmful ones.
the organism's environment
it is helpful in one way but harmful in another