Final answer:A semi-permeable membrane is abiological membranethat selectively allows certain substances to pass through. It controls the movement of molecules and ions in and out of cells. Examples include osmosis and simple diffusion.Explanation:Semi-permeable MembraneA semi-permeable membrane is a type of biological membrane that allows certain substances to pass through while blocking others. It acts as a barrier that controls the movement of molecules and ions in and out of cells. One example of diffusion across asemi-permeable membraneisosmosis,which is the movement of water across the membrane to equalize the concentration of solutes on both sides. Another example is the simple diffusion of small, uncharged substances through the lipid bilayer of the cell membrane.Learn more about Semi-permeable Membrane here:brainly.com/question/33302881#SPJ2...

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