please help:(( The surface area of a reaction increased you now have ___ collisions and collision energy

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

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.

Which of the following is a heterotroph?