Vertical lines cutting across the line of internal interaction represent internal service encounters. a. True
b. False

the period of human evolution has coincided with environmental change, including ('hominin' refers to any bipedal species closely related to humans – that is, on how do we know earth's climate has changed? a map showing dates and locations of prehistoric archeological sites and migration routes from africa into.

answereruption of molten material; magnetic stripes in the rock of the ocean floor; the age of the rocks themselves;