To understand and separate organisms, which would help in the case that something were to happen to any organism, and with classification, we would be able to use the knowledge to help or get rid of it.
Economic is using resources with care and without waste operating with little waste or at a savings
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Pathogens are microorganisms - such as bacteria and viruses - that cause disease. Bacteria release toxins and viruses damage our cells. White blood cells can ingest and destroy pathogens. They can produce antibodies to destroy pathogens, and antitoxins to neutralize toxins.