They are extremely hazardous compounds because they tend to be nonbiodegradable, and they tend to bioaccumulate. Also known as organochlorides. The transfer of energy and material through a series of organisms by each one s being fed upon by the next. The occurrence of adverse effects on the immune system that may result from exposure to environmental agents such as chemicals. A mutation is a change in the genetic material in a body cell.
Mutations can lead to birth defects, miscarriages, or cancer.
The dose of chemical at which this were no statistically or biologically significant increases in frequency or severity of adverse effects seen between the exposed population and its appropriate control. Effects may be produced at this dose, but they are not considered to be adverse.