The cell wall is only present in animal cells supports and protects the cell is made of cellulose does not allow the transport of chemicals is thick and rigid

supports and protects the cell

is thick and rigid

Explanation:

Cell walls of plants are made of cellulose. However, some cell walls are made of chitin such as those of fungi. They are thicker then the cell membrane and their structure are rigid. They form a mechanically protective enclave for the cell and give structural strength to a cell.

the right answer is it connects amino acids

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.