Final answer:
Osmosis is the movement of water across a semipermeable membrane from a region of high to low water concentration, an essential biological process for maintaining cellular integrity. The correct example of osmosis is water moving across a semipermeable membrane.
Step-by-step explanation:
The process of osmosis involves the movement of water across a semipermeable membrane from an area of high water concentration to an area of low water concentration. This is seen when water moves to equalize concentrations on both sides of the membrane. A classic example to demonstrate this process is the immersion of cells into sugar solutions of various concentrations. When water moves across the cell membrane to balance solute concentrations, it demonstrates osmosis in action. Therefore, the correct answer to which of the following is an example of osmosis is: B) Water moving across a semipermeable membrane.
Examples of osmosis are seen in biological systems, such as when carrots and celery become limp due to water loss, they can regain turgidity by absorbing water through osmosis when placed in fresh water. Additionally, solute concentrations in body fluids are important to maintain proper cellular function and to avoid conditions like hemolysis or crenation. Overall, osmosis is a vital biological process allowing cells to maintain homeostasis and adapt to changes in their environment.