Name the molecule that is the focus of current research on how sickled erythrocytes protect against Plasmodium falciparum infection and state how this molecule is thought to reduce the growth of the parasite?

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.