Answer:
Most GMO plants produced and consumed in the US today are those that allow for resistance to a specific herbicide, like Monsanto’s Roundup. Roundup Ready soy, corn, and beets grow from seeds that have been genetically modified to grow even when glyphosate weed killer (Roundup’s scientific name) is applied to them.
While Roundup has not tested as toxic to humans and other mammals, the longer it has been on the market, the worse its effects on soil health and long-term plant fecundity appear. In addition, Roundup Ready plants may not allow necessary micronutrients to be absorbed by animals consuming them and may also play a part in the recent die-off of bees, WHICH IS BAD.