41. Sublethal effects consist of any effects of an organism caused by a toxicant that do not include death. 42. In addition, Frye's research has concluded that autism may be caused by exposure to toxicants . 43. It was not till the 1970's where rules were passed to regulate the exposure of these toxicants . 44. These categories include toxicants such as polycyclic aromatic hydrocarbon ( PAHs ) and carbon tetrachloride ( CCl 4 ). 45. Toxicants can affect an organism s physiology which may impact its growth, reproduction, and / or development.46. Biomagnification of toxicants is often a problem in salmon due to a varied diet of benthic invertebrates and fish. 47. Others, she theorizes, may develop the sensitivity after repeated low or single high exposures to a particular toxicant . 48. Chemists with the USDA are investigating the use of theobromine as a toxicant to control coyotes that prey on livestock. 49. Toxicant -Induced succession would be the development of more tolerant generations once a chemical was introduced into the environment.50. Toxicant can cause co-tolerance for species if they re closely related chemistry or have similar modes of action.
