Which would be the best evidence that a cell is using active transport to move a substance across its cell membrane? a. substances are moving rapidly across the cell membrane b. atp is being rapidly used near the cell membrane c. substances are moving from high to low concentrations d. substances are moving through channels in the cell membrane

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.