What is a characteristic of genetically modified organisms (GMOs)?

Genetically modified organisms (GMOs) are defined by the characteristic that they possess genes from multiple sources, which makes the selection of the answer completely accurate. This gene transfer often involves the introduction of new traits into an organism by incorporating genes from other species. By using biotechnology techniques, scientists can enhance desired traits or introduce new ones, such as resistance to pests, improved nutritional content, or adaptability to environmental stress.

The incorporation of these genes from various sources distinguishes GMOs from traditionally bred organisms, which receive genes only from the same or closely related species. The genetic modification process is a deliberate and controlled intervention, allowing for combinations that are not possible through natural sexual reproduction.

Other options present contrasting concepts. Option A, which describes GMOs as "fully natural and unaltered species," fails to recognize the fundamental nature of GMOs as products of human intervention. Option C suggests GMOs are unaffected by environmental changes, which is not accurate; GMOs can still be influenced by their environment and may exhibit varying responses depending on conditions. Lastly, option D, stating that they are species with no scientific intervention, is contrary to the very definition of GMOs, as such organisms are defined by the intentional modifications made through biotechnology.