Mitochondria are thought to have evolved from prokaryotic cells that were ingested by an ancestral cell. Which feature have the prokaryotes lost during
their evolution into mitochondria?
A) circular chromosome
B) cell wall
C) endoplasmic reticulum
D) ribosomes

It's B) Cell wall hope this helps Have a nice day

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.