It's true that "tree" and "Black" are both not meaningful biological categories but the reason why is very different. Trees evolved thousands of times and we ha

It's true that "tree" and "Black" are both not meaningful biological categories but the reason why is very different. Trees evolved thousands of times and we have a large number of species that could either be shrubs or trees. The reason why our ideas of race are not meaningful biological categories is more similar to why certain "species" of citrus aren't meaningful categories. Because phylogenetic evidence turns out to show that the genetic distinction is not meaningful or distinct enough to separate them into separate taxons. Which could be to hybridization, or just plain lack of genetic differences