Which of the following can pass through both a filter and a semipermeable membrane?

A true solution is defined as a homogeneous mixture where the solute is completely dissolved in the solvent at the molecular level. In a true solution, the particles of the solute are typically smaller than 1 nanometer in diameter, which allows them to easily pass through both a filter and a semipermeable membrane. This is because filters usually catch larger particles (like those found in suspensions or colloids), while semipermeable membranes selectively allow certain sizes of molecules or ions to pass.

For example, in a biological context, nutrients dissolved in blood plasma (which is a true solution) can easily move across cell membranes, which are often semipermeable. This functionality is essential in physiological processes, such as nutrient uptake and waste elimination.

The other options—colloids, suspensions, and emulsions—contain larger particles or aggregates that do not pass through a filter or a semipermeable membrane. Colloids consist of larger particles that can scatter light and do not settle out, suspensions contain larger solid particles that will eventually settle out of the mixture, and emulsions involve mixtures of immiscible liquids where globules are larger than the particles in a true solution. Therefore, these types cannot pass through the mentioned