What are some problems with racial classification?
_____ is the process by which organisms cope with environmental forces and stresses.
Food production was developed approximately _________ years ago.
Ratherfthan assign racial classes it is more productive to _______ the ______. (two words, separated by a comma)
When analyzing the differences between physical appearances of people it is useful to consider ancestry, natural selection, and _____ for skin color, ______ for bone structure, and _____ ______ for embryonic developement. (3 answers separated by commas)