Question

which one of the following is not an example of passive transport?
diffusion
osmosis
filtration
solute pumping

Explanation:

Passive transport is a type of membrane transport that does not require energy to move substances across cell membranes. Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. Osmosis is the diffusion of water across a selectively permeable membrane. Filtration is the movement of water and solutes across a membrane due to hydrostatic pressure. Solute pumping, on the other hand, is an example of active transport as it requires energy (usually in the form of ATP) to move solutes against their concentration gradient.

Answer:

solute pumping