Foresenic Anthropology exists because it observes the minor, external differences between the so-called "races". Genetically, there is no difference. You seem focused on the superficial minor differences rather than understanding that at the basis of what makes a human a human, a member of the species Homo Sapien Sapiens is the arrangement of the Genes, not whether their skull is one shape or another. All the "races" share the same genetic pool. It is what allows them to all interbreed. They are not separate species.
As for IQ tests - they all, often subtly, show their cultural biases. Doesn't matter who wrote them, they are all reflect where they came from and who they are. They are designed to measure an immeasurable concept - intelligence. No one can describe it, no one can figure out what it is. Tool making and use was once consider what denoted intelligence. Observation of animals has shown it is far more common than originally thought. Animals can be intelligent. Birds can use tools, mammals can use tools, insects can use tools. Some consider Dolphins and Whales intelligent and they don't use tools. Statistically, IQ tests are meaningless as they use far too smaller sample (ie individuals).
Are you aware of the history of the discipline of anthropology and why it was created? If you were, you wouldn't be so quick to reach for it as a tool to use against me. It was created to justify European Imperialism in the 19th century. It was used to justify Racism. Today, it tries to hide that sorry past in how it was used to justify the oppression of peoples because they had different coloured skin/eye shapes/thicker lips/kinky hair.