Which two statements best describe jet streams in the northern hemisphere? A. The subtropical jet stream separates warmer air near the equator and cooler air to the north. B. The polar jet stream circulates air between the North Pole and the South Pole. C. The polar jet stream separates colder air near the pole and warmer air to the south. I D. The subtropical jet stream causes ocean currents to form near the equator.

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.