There is no evidence that GMOs have improved food production.
There is no way to know for sure, since GMO ingredients are not labeled in the United States. However, if the product contains corn, soy, canola, or papaya in any form, the likelihood that the food contains GMOs is high.
There is no known information that indicates GMOs are easier to grown than non-GMOs.
GMOs (genetically modified food) may create allergies.
You taste it.
Science Diet dog food may or may not contain GMOs. If a particular type of Science Diet contains soy or corn in any form the likelihood that they are GMO is almost certain. Science Diet uses the word "natural" to describe their products, but in the food industry, it can mean almost anything. What it definitely does not mean is "GMO free" or "organic."
Israel is not against genetically modified food, but most Israeli food comes from Europe. Therefore, GMOs are rare in Israel.
Nutrition facts ;)
You can tell if a food contains an acid by tasting it. Acids typically give foods a sour or tangy flavor. Additionally, you can use pH test strips to measure the acidity level of a food.
Regulation of food began as early as the 1800s and food labeling regulation arose out of that. Recently, requiring GMOs to be labeled has been a major debate, mostly between consumers and companies who produce GMOs, food companies, and grocers. To this date, GMO ingredients are not required to be listed on food labels.
Most foods in Aldi's are likely to contain GMOs. In the United States, GMO foods are not labeled, but any food that contains corn, high fructose corn syrup (HFCS, which is made from corn), soy, and some other ingredients, is almost sure to have GMOs unless it is labeled "100% organic" (and even then it may not be completely free of GMOs).
Organic and GM food is not exactly opposite, but foods that are grown and sold as "100% organic" cannot intentionally contain GMOs. It is possible, though, that cross pollination of GMOs with organic crops of the same kind could happen unintentionally.