Using the lac operon as an example, explain how the genes are activated in the presence of lactose. what occurs when the genes are activated? what is the lac or on activated?

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

not too sure but maybe in the hot springs.

i believe your answer would be c.. : )

if you know your abc's you should be able to get your answer or just use google