Three potted plant were kept in a dark cupboard for two days before being used for an experiment, Each plan was then put under a bell jar under different conditions as shown, suggest why the bell jar F was covered with aluminum foil.
Final answer: The absence of starch in the leaves is due to the lack of photosynthesis when the plants were kept in a dark cupboard. Sodium hydroxide under bell jar D is used to absorb carbon dioxide, affecting photosynthesis.
