Without each other, they might not be able to work and do what they are supposed to do. They are used to describe life because without cellular energy (energy metabolism), there would be no movement and if there was no ATP to provide movement, then cellular functions would not have occurred. energy to move or produce work correctly. If they don't have the energy to function properly, cells won't be able to grow or divide, which could pose multiple problems for life in general. If there is no cell growth, there will be no cell reproduction. If there is no cell reproduction, there cannot be variation by meiosis. These four characteristics depend on each other to provide a