A special type of diffusion where only water moves across a partially permeable membrane Blank 7 Question 8

The special type of diffusion where only water moves across a partially permeable membrane is called osmosis.

Here's a step-by-step explanation:

1. Osmosis is a type of passive transport, which means it does not require energy.

2. In osmosis, water molecules move from an area of high water concentration (or low solute concentration) to an area of low water concentration (or high solute concentration).

3. This movement occurs across a partially permeable membrane, which is a barrier that allows certain substances to pass through while blocking others.

4. Osmosis is a crucial process in biological systems, helping to regulate the amount of water in an organism's cells and maintain homeostasis.

So, the correct answer is Osmosis.