The following are the major concerns about GM crops and GM foods, except

the GM crops may change the fundamental vegetable nature of plant as the genes from animals (e.g. fish or mouse) are being introduced into crop plants

the GM crops may lead to change in the evolutionary pattern

the antibiotic resistance marker genes used to produce GM crops may move from plants to gut microflora of humans and animals and increase the problem of antibiotic resistance in pathogens

the introduction of GM crops has reduced the crop yield