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.

cats appear to have glowing cat eyes because the back of their eyeballs includes a special reflective surface called the tapetum lucidum. this lets them see better during the night, giving them a much better vision.

for example, no new evidence will demonstrate that the earth does not orbit around the sun (heliocentric theory), or that living things are not made of cells (cell theory), that matter is not composed of atoms, or that the surface of the earth is not divided into solid plates that have moved over geological timescales .