What is a genetically modified organism (GMO)?

A genetically modified organism (GMO) is accurately defined as an organism that has been altered through genetic engineering. This process involves directly manipulating an organism's DNA to achieve desired traits or characteristics, such as increased resistance to pests, enhanced nutritional value, or improved growth rates. This form of modification is distinct from traditional breeding methods, which involve hybridization and selection over generations but do not change the organism's genetic material at the molecular level.

The emphasis on "genetic engineering" distinguishes GMOs from other forms of modification. While traditional breeding can enhance certain traits, it does not involve the precise and targeted changes to the organism's genome that characterize genetic engineering. Therefore, the answer aligns accurately with the scientific definition of a GMO, highlighting the advanced techniques used in modifying the organism.