Toxins are defined as naturally occurring poisonous substances that are produced by living organisms. This includes a variety of biological sources such as plants, animals, and microorganisms. These substances can affect the health of an organism that comes into contact with them, leading to harmful effects or even fatalities.
Certain examples include snake venom, which is produced by snakes, and mycotoxins, which are harmful compounds produced by certain molds. Understanding toxins in this way is crucial in forensic science, as knowing the origin and effects of these substances can play a significant role in investigations, particularly in cases involving poisoning or environmental hazards.
Other options mentioned do not capture the essence of what toxins are. Artificial chemicals, while sometimes toxic, do not meet the natural criteria. Attractants, although used in crime scene investigations, do not pertain to the nature of toxins. Common medications may have dangerous side effects in large doses but are not classified as toxins unless specifically created as such or misused, which again falls outside the definition.