Variable

toc = Definition: = Any condition or factor that can be manipulated, controlled, or measured. Gen Psych Chapter 1 pg. 21-24

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=In the News:= Pesticides persist in ground water Numerous studies over the past four decades have established that pesticides, which are typically applied at the land surface, can move downward through the unsaturated zone to reach the water table at detectable concentrations. The downward movement of pesticide degradation products, formed in situ, can also contribute to the contamination of ground water. Once in ground water, pesticides and their degradation products can persist for years, depending upon the chemical structure of the compounds and the environmental conditions. Scientists at the U.S. Geological Survey (USGS) investigated the occurrence of selected pesticides and their degradation products in ground water during a study funded by the USGS National Water-Quality Assessment (NAWQA) Program. [] Homosexual behavior due to genetics and environmental factors Homosexual behaviour is largely shaped by genetics and random environmental factors, according to findings from the world's largest study of twins. Writing in the scientific journal //Archives of Sexual Behavior//, researchers from Queen Mary's School of Biological and Chemical Sciences, and Karolinska Institutet in Stockholm report that genetics and environmental factors (which are specific to an individual, and may include biological processes such as different hormone exposure in the womb), are important determinants of homosexual behaviour. []

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