The spongy mesophyll of a leaf contains large air spaces. Which statement explains how these air spaces increase the rate of photosynthesis in the leaf?
They give a large surface area, so carbon dioxide diffuses in faster
They give a short diffusion path, so oxygen leaves the leaf slower
They give a large surface area, so more water evaporates from cells
They give a short diffusion path, so more light reaches the palisade
38 exam-style questions on AQA GCSE Biology 2.3 Plant tissues, organs and systems, covering 2.3.1 Plant tissues and 2.3.2 Plant organ system. Each one has a worked solution and a mark scheme showing where the marks go.