Which concept was introduced in biology classes to promote Aryan superiority?

The concept of eugenics was introduced in biology classes to promote the idea of Aryan superiority, particularly during the early to mid-20th century. Eugenics is the study of or belief in the possibility of improving the human race by selective breeding or other forms of intervention. This ideology was misused to justify racial discrimination and social policies aimed at promoting what were considered "desirable" traits in the Aryan population while diminishing the status of other races.

Eugenics claimed to scientifically validate the notion of racial hierarchies, arguing that certain races were superior to others based on genetics. This ideology found platforms in various government policies and social movements, most notoriously in Nazi Germany, where it contributed to widespread human rights abuses and atrocities.

Other concepts like cellular biology, microbiology, and genetics do not directly promote ideas of racial superiority in the same way. While genetics could provide the biological underpinnings for eugenic theories, it is specifically the social and ideological framework of eugenics that directly aligns with promoting the notion of Aryan superiority.