If there's options, I assume mutation?
Where organisms are better adapted to their environments tend to survive and produce more kids!
A cell is analogous to an engineered watch because it consists of numerous interdependent sub units and also because coded information can not arise from random processes. A cell is the basic unit of living systems. Although it is relatively easy to visualize the components of cells, it is difficult to conceptualize how these components function together to sustain life within the cell.
The best I think would be meters
