During photosynthesis, autotrophic plants absorb raw inorganic materials to synthesise glucose.
Describe how the internal structure of a leaf is adapted to maximize the diffusion of carbon dioxide to the photosynthesising cells.
Write the balanced chemical equation for photosynthesis.
A simple controlled experiment can be carried out using a leaf partially covered with a lightproof material, such as black paper, to show that light is necessary for photosynthesis.
Explain why the plant must be kept in a dark room for 24 to 48 hours before starting this experiment.
Identify the control region of the leaf in this investigation.
Describe how you would test the leaf for the presence of starch after it has been exposed to light. Include the safety precautions you must take and the expected results for both the covered and uncovered regions of the leaf.