Tornadoes only form under certain weather conditions. There are three types of airs for a tornado to form, warm humid air close to the ground, cold air in the upper atmosphere, and hot dry air on top that form a cap.(na, 2010) Hurricanes can form tornadoes adding to their destructive power.
Genetically modified crops. Genetically modified crops (GM crops, or biotech crops) are plants used in agriculture, the DNA of which has been modified using genetic engineering techniques. In most cases the aim is to introduce a new trait to the plant which does not occur naturally in the species.
Here's a list of the most common genetically modified crops: 1  Soybeans which are resistant to herbicides. 2  An herbicide resistant gene is taken from bacteria and inserted into the soybean plant.he concerns about these genetically modified crops include the potential human health impacts, including cancers, nutritional problems, allergens, and the transfer of antibiotic resistance markers resulting in antibiotic resistant diseases.