Final answer:
Brazilians do not use phenotype-based categories to determine race or descent. The concept of race is not scientifically valid. Biological anthropologists have demonstrated that human traits vary along a spectrum.
Step-by-step explanation:
Brazilians do not use several categories based on phenotype to determine race or descent. The concept of race itself is not scientifically valid. Anthropologists, biologists, and geneticists argue that there is no accurate way to divide the human population into racial categories. Biological anthropologists have demonstrated that human traits such as skin colour, facial features, hair texture, and blood type vary along a spectrum, making racial distinctions inaccurate.