A student carries out an experiment to investigate the role passive transport plays in maintaining homeostasis in organisms. For this investigation, the student uses two gummy bear candies to represent animal cells. The student records the mass of each bear. Then, he places one in a beaker filled with distilled water. He places the other in a beaker filled with salt water. After 48 hours, he removes the bears from the beakers and records their masses again. He finds that the mass of the gummy bear in the distilled water significantly increased, while the mass of the gummy bear in the salt water significantly decreased. Which of the following is the BEST interpretation of the observations made during the investigation?

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Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.