How can researchers understand if a human activity, such as pollution, negatively affects the abundance of a native species in a short amount of time? Measure the density of the native species in a single location for many years. If pollution negatively affects the native species, there will be a negative correlation between the density of the native species and pollution. Measure the density of the native species in many different locations. Measure the density of the native species and a range of intensity of pollution in many different places. If pollution negatively affects the native species, there will be a negative correlation between the density of the native species and pollution. Measure the abundance of the native species in different places that might have been affected by different pollutants.

18. determine whether each stateme blank space given. ach statement is true (t) or false (f). place your answer in the 8. when a cell is put into an isotonic solution, individual wat put into an isotonic solution, individual water molecules cannot move back and forth across the cell membrane. d. when a cell is put into a hypertonic solution, there is a net movement of water molecules across the cell membrane into the cell. c. when a cell is put into a hypotonic solution, there is a net movement of water molecules across the cell membrane out of the cell. d. the movement of any solvent across a semi-permeable membrane is called osmosis. e. carrier proteins have the ability to change shape and physically move molecules across the cell membrane. f. in facilitated diffusion, the concentration of the molecules to be moved across the cell membrane is higher inside the cell.