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If a person doesn't eat a balanced diet, they are...

If a person doesn't get enough of a vitamin or mineral, they could get a...

The rate at which a chemical reaction takes place in cells.

Disease causing microorganisms.

They ingest microorganisms, produce antibodies and antitoxins.

Medicine that kills bacteria.

The spread of disease within one country.

The spread of disease throughout several countries.

Changes in the environment that are detected by sensory receptors.

Detects changes in the environment.