In bright daylight, photosynthesis in a leaf is faster than respiration, so the leaf takes in carbon dioxide. The rate of photosynthesis then decreases but remains faster than the rate of respiration.
Explain why carbon dioxide now diffuses from the air into the leaf cells at a lower rate.
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.