As a natural process, evolution is described as one in which a population gradually changes over time and eventually experiences a change in its DNA.

In order to live and generate more offspring, species must better adapt to their environment. Charles Darwin is credited with developing this hypothesis, which claims to be the main mechanism by which evolution takes place. According to this hypothesis, each generation produces more offspring than may possibly live; as a result, only the fittest and strongest individuals who can adapt to their environment would survive. In other words, siblings will have to compete for the resources that are available. A sea turtle may lay up to 110 eggs, but only a very small percentage of them hatch into fertile adults that can reproduce. Because of this, only the strongest individuals are chosen to mature and pass on their genes to the following generation. Competition for the limited resources is a selective pressure, which has an impact on the population as a result of natural selection.