Plants absorb water and mineral ions from the soil through their roots. The surface of a root is covered in root hair cells. Each root hair cell has a long, thin extension that projects out into the spaces between the soil particles.
Explain how the long, thin extensions of root hair cells increase the rate at which a plant absorbs water.
The extensions of root hair cells grow out between the soil particles, so that they reach soil water that the plant has not yet absorbed from. Explain how this increases the rate at which water is absorbed.
A plant has a much greater volume than a single-celled organism. Explain why a plant needs exchange surfaces such as roots and leaves.
58 exam-style questions on AQA GCSE Biology 1.3 Transport in cells, covering 1.3.1 Diffusion, 1.3.2 Osmosis, and 1.3.3 Active transport. Each one has a worked solution and a mark scheme showing where the marks go.