The giant continent which was composed of all the land on Earth was called a. Pangaea.
c. Gondwana.
b. Panthalassa.
d. Laurasia.

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.

is this for the e2020 class