Describe how increased knowledge about factors that affect toxicity, such as water hardness and complexing of metals with dissolved organic carbon (DOC), has influenced the way that the regulatory community views toxicity of metals in aquatic ecosystems.

Which of the following will a bacterium produce when a human gene is added to its genome? question 4 options: human carbohydrates a protein made up of both human and bacterial properties the human protein coded for by the human gene human plasmids that can be isolated from the bacterium