The two major models for a mechanism to drive plate tectonics are the ridge-push, slab-pull and the convection models. the convection model relies on between the top of the convecting cell and the base of the lithospheric plate, and the push/pull model relies on the ridge and pushing the plate outward as the ridge falls in elevation

Most sociologists agree that: a. culture is central in shaping gender roles, but only in preliterate societies. b. biological factors have some influence, but cultural factors are more important determinants of gender roles. c. biological factors are influential in determining gender roles, but only in industrial or complex societies. d. biological factors only explain differences between men and women with regard to aggression and disease. e. there is no difference between the influences of culture or biology on the development of gender roles, as they are unpredictable.