Astudent is looking at a picture of a cell taken through a microscope. the presence of which of the following would indicate that the cell is eukaryotic a. cytoplasm b. dna c. nucleus d. plasma membrane

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.

cell regulation is conducted by special proteins.