How can you tell if a potato is genetically modified?

Online Answer
There is no definitive way to tell if a potato has been genetically modified by looking at it. GMO White Russet potatoes can be identified by their branded bags with language such as "reduced bruising" and "fewer black spots," but they may also be found in prepared and processed foods.
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Although not a perfect test, your senses are usually the most reliable instruments to tell if your foods have gone bad. The first signs of bad pizza are a hard and dry texture, still safe but not too tasty. A spoiled pizza may also give off a rancid odor and become moldy if left too long.
Freshly cooked chicken will have a brown or white color to the meat, and, over time, as it spoils, cooked chicken looks grey, or green-grey. Other signs of spoiled cooked chicken are a bad, offensive smell, a chicken that's slimy after cooking, and mold or white spots on cooked chicken..
How can we distinguish horse chestnuts from sweet chestnuts?
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Now if you don't have a thermometer, there are some signs that will tell you if chicken is properly cooked through. Chicken is done when the juices run clear when pierced with the tip of a paring or fork and the meat is no longer pink..
If you're wondering how to tell an egg is hard boiled, set it on the counter and give a quick spin. Once it's moving, tap your finger on it to stop the spinning. Eggs that are cooked will spin easily and rapidly and stop quickly.