According to cell theory, which activity is impossible?

Cells being formed from pure water. APEX

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added