When scientists take the genes of two different species and combine them, we call this

When scientists take the genes of two different species and combine them, we call this genetic engineering.

Explanation:

Genetic engineering is a collective term for the molecular techniques used to alter an organism's inheritance. The techniques range from inactivating a gene or introducing a small change in a gene (a single inheritance system) to transferring genes from one organism to another. A genetically modified organism is often referred to as a transgenic organism.

Genetic engineering is used for example in biotechnology and medicine. For example, insulin or human growth hormone is produced in bacteria and insect and / or herbicide resistant cereals are grown for commercial use.

Of course, in addition to genetic engineering being a technically difficult area, it also involves ethical aspects, especially in terms of human application and animal cloning.

the answer is not negative reinforcement.