What's the Difference Between Human and Chimpanzee Culture?

I've long been curious about or when we see those kinds of differences, how much are they driven by social roles versus more evolutionary and biologically rooted forces? Where do you come down on that? I start to believe that there's a lot to be learned from studying the way that cultures are created. How do chimpanzees build cultures? Through our observation, imitation and practice. And that is one definition of human culture, behavior passed from one generation to the next through observation.