The over utilization of a species of organisms occurs when the organisms are killed for purposes such as food or trade of their body parts, but their killing is uncontrolled and their populations are not allowed to recover.
Poaching brings about over utilization very quickly, as poaching is an illegal activity so poachers do not respect regulations in terms of killing organisms. Moreover, poachers kill organisms in very large numbers, meaning that every single poacher leaves a huge impact on the population of the specie.
Poaching of protected old growth forest trees in British Columbia, Canada can result in the decimation of these ancient giants and destroy the biodiversity that they represent because many other plants depend on them like undergrowth species.
The answer is cancer. Cancer is an uncontrolled division of cells. The regulation of cell cycle is necessary for normal cell division. The first phase of the cell cycle is the G1 phase. If the G1 phase is affected, mistakes in this process lead to the uncontrolled division of cells called cancer.