a) How does the direction of the currents in the Northern Hemisphere differ from those in the Southern Hemisphere? Why does this occur?

imagine a line passing through the center of earth that goes through both the north pole and the south pole. this imaginary line is called an axis. earth spins around its axis, just as a top spins around its spindle. this spinning movement is called earth's rotation. at the same time that the earth spins on its axis, it also orbits, or revolves around the sun. this movement is called revolution.

not sure if this is what you'r looking for prokaryotes have organelles hope this out at least.