What is osmosis and why does it occur?
Osmosis is the movement of water molecules from an area of high water concentration to an area of low water concentration through a partially/selectively permeable membrane (PPM). It occurs because of concentration gradients; the water moves from the high water concentration area through the PPM to 'balance out' the amount of water on either side of the membrane - that is, to ensure an equal amount of water molecules on each side of the membrane.
AH
Related Biology GCSE answers
All answers ▸What is the difference between mitosis and meiosis?
What is the difference between diffusion, osmosis and active transport?
In the food web shown: Heather -> Rabbit -> Fox, only a small percentage of the Sun’s energy captured by the heather is eventually incorporated into the body tissues of the fox. Explain what happens to the rest of the energy captured by the heather.
How would a reduced level of chlorphyll in a plant cause a stunted growth? Can anything else affect growth?