You observe a cell that contains fluid of that is 15% calcium the extra cellular fluid around the cell contains 5% calcium if you observe the calcium moving through channel proteins or the outside of the cell watches for mechanism of you observing

it is cell differentiation

Explanation:

the cell would bursts and the fluid would come out through the exocytosis.

i am positive it is c. condensing but i may be wrong

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.