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DDT was first used as an insecticide in 1942. Resistance genes existed before this time in houseflies and other insects. By 1970, no farmer would bother using this chemical. Why?
Aversive Event
An unfavorable or unpleasant event intended to decrease the likelihood of a behavior by association.
Blood
A vital liquid in humans and many animals, composed of cells and plasma, that circulates through the body delivering oxygen and nutrients while removing waste products.
Turbulence
Turbulence refers to violent or unsteady movement of air or water, or a situation characterized by conflict or confusion.
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