What is the primary source of energy?

What effect does plate tectonics have an organic evolution

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000