200 A Industrial fuse. 80 kA breaking capacity. In electronics and electrical engineering, a fuse is an electrical safety device that operates to provide overcurrent protection of an electrical circuit including the source of power and the load.
In order for natural selection to operate on a trait, the trait must possess heritable variation and must confer an advantage in the competition for resources. If one of these requirements does not occur, then the trait does not experience natural selection.
Though natural selection acts on individuals, the effects of chance mean that fitness can only really be defined on average for the individuals within a population. The fitness of a particular genotype corresponds to the average effect on all individuals with that genotype.