Trait controlled by the both environment and genetic factor. Usually, multifactorial traits outside of illness result in what we see as continuous characteristics in organisms, especially human organisms such as: height, skin color, and body mass.
I recently took a drug test for a job. I tested positive for opiates in my urine. I do not and have never taken drugs of any sort other than alcohol. I dont take any prescription drugs, how is it possible that this happened. I hade consumed some beer about12 hours before the test.
Drug tests don't look for the THC in your urine. They look for the metabolite that is resultant of your body breaking down the THC in your fat cells, 9-carboxy-THC. If your body weight is high because of a high amount of body fat, this could prolong how long THC stays in your system.