Apaleontologist finds a footprint with what looks like an opposable thumb. what type of animal is it most likely from? a. a primate other than a human c. homo habilis b. homo erectus d. australopithecines

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

the answer is a) cell division.

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