Effective monitoring of the environment for toxicity

All of these responses are quantifiable and this chapter discusses some of the issues associated with ensuring that such toxicity data are of the highest possible quality. In the spirit of the saying garbage in, garbage out we first discuss 

Level of biological organisation Types of measurable responses 

Molecular Structural and/or functional changes (e.g. amplification, translocation or mutation of genes, enzyme function, protein production) 

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