Dissolved oxygen diffuses from water into the blood across the gills of a fish. The flow of water over the gills becomes much slower.
Suggest and explain how this change affects the rate at which oxygen enters the blood.
140 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.