Chemicals that are found in an organism but are not produced by it or expected to be there, such as drugs or pollutants, are called:

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Xenobiotics are chemicals that are foreign to an organism and not produced by it. They can include drugs, pollutants, or other unnatural substances that may have harmful effects on the organism. Probiotics and prebiotics are types of bacteria, and antibiotics are drugs used to kill bacteria. Xenobiotics are chemicals that are foreign to an organism and are not expected to be present. They can include drugs, pollutants, and other substances that are not naturally produced by the organism. Probiotics and prebiotics are both types of substances that are intentionally introduced into an organism, while antibiotics specifically refer to drugs that are used to kill bacteria.

Chemicals That Are Found in an Organism but Are Not