which of the following is an example of scientific racism used during the nineteenth and twentieth centuries?

One example of scientific racism used during the nineteenth and twentieth centuries is the concept of social Darwinism. This theory used Charles Darwin's theory of natural selection to argue that certain races or ethnic groups were inherently superior or inferior to others based on their perceived level of advancement or "fitness." This theory was used to justify colonization, imperialism, and racial segregation, among other practices.

One example of scientific racism used during the nineteenth and twentieth centuries is the theory of racial hierarchy. This theory categorized different racial groups into hierarchies based on traits such as intelligence, morality, and physical features. It was often used to justify the domination and oppression of certain racial groups by others.

Scientific racism refers to the pseudoscientific claims and theories that were used to justify racial hierarchies and discrimination. Various examples of scientific racism were prevalent during the nineteenth and twentieth centuries. One such example is the theory of eugenics.

Eugenics was a movement that gained significant popularity during this time and sought to improve the human population through selective breeding. It was often used to support the belief in maintaining the purity of certain races and promoting racial superiority. This ideology was used to justify policies such as forced sterilization, immigration restrictions, and discriminatory practices.

It is important to note that scientific racism is now widely discredited and rejected by the scientific community due to its lack of scientific evidence and the harm it has caused.