The first step of the energy usage for growth is the breakdown process. In order the animal cells can use the food, the food they eat must be broken down into smaller molecules. Step 2 is the process glycosis which converts each molecule of glucose<span> into two smaller molecules of Acetyl CoA. Step 3 is the complete oxydation of acetyl, CoA to H2O.</span>
The molecular clock is a scientific technique which presents a means of estimating evolutionary rates and timescales using genetic data. It uses mutation rate of biomolecules when two or more life forms diverged to estimate the time. Answer is B.
