To function on their own unicellular organisms must do what? a) make tissues b) perform a specialized task c) work with other cells or d) do all jobs for survival

d) do all jobs for survival

Explanation:

A single cell perform all its activity on its own.

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.