Natural Selection If you have some feature that lets more of your offspring survive and grow up to reproduce than those without it, then more and more individuals in later generations will come to share that feature. That feature is adaptive Selective advantage Why are there different cultures? How did they get the way they are? Ecology 1. 2. 3. How does the environment affect the organism? How does the organism affect its environment? How does the organism affect other organisms in its environment? Exchanges of energy and matter— nutrients and chemicals necessary for life— Web of life Cultural Ecology Basic question of sociocultural anthropology— how do we explain cultural similarities and differences? Cultures are systems, but some parts are more important than others. Ideology People’s ideas about how the world operates Cultural codes Ways of understanding the world