<span>The answer is Plant cells have large vacuoles, and animal cells do not. The vacuole is responsible for turgor pressure. A plant cell has one large central vacuole. On the other side, an animal cell may have one or more small vacuoles or may do not have any.</span>
There is a place in the lid where the fluid rushes to when you tip it, leaving the air bubbles in the cylinder of the bottle. In some companies it's a chemical inside the fluid that can evaporate over time and looses it's " magic" effect.
Sample b is the control group because it’s the group not being tested and being kept the same.