To humans? No use.
To themselves? To replicate their genetic material. The ultimate purpose of life; to reproduce.
PS: Some organisms we find useful, such as Escherichia coli, can be harmful out of their useful area.
To humans? No use.
To themselves? To replicate their genetic material. The ultimate purpose of life; to reproduce.
PS: Some organisms we find useful, such as Escherichia coli, can be harmful out of their useful area.
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