An important purpose of a cell wall in bacteria is to
prevent the cell from adhering to other cells.
prevent the cell from collapsing,
prevent the cell from being eaten.
allow the cell to live in water.
allow the cell to take in nutrients.

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.