A<unk>  <unk>  is an organism whose genetic material has been altered using the genetic engineering techniques generally known as recombinant DNA technology. With recombinant DNA technology, DNA molecules from different sources are combined in vitro into one molecule to create a new gene. This<unk>  DNA is then transferred into an organism causing the expression of<unk>  or novel traits. The product is also known as an<unk>  Engineered Organism or GEO.
The term "GMO" has historically been defined as organisms whose genetic makeup has been altered by conventional cross breeding or by "mutagenesis" breeding, as these methods predate the discovery of the recombinant DNA techniques. However, this term is now interchangeable with<unk>  Engineered Organism.
Genetically modified organism
Viral vector
Aerobic organism
Vector 
Vector
Chemical substance
Opportunistic infection
Helper dependent virus