Study the diagram and answer the questions that follows.

(a) Identify the experiment to be performed with this leaf.

(b) What will you observe if starch test is performed on this leaf?

(c) What does the experiment signify?

(a) The above experiment is used to prove that the chlorophyll is necessary for photosynthesis.

(b) When we test the leaf for starch, we observed that only the areas of leaf which were green (i.e. contains chlorophyll) turned blue-black showing the presence of starch.

(c) The experiment proves that photosynthesis can occur only in the presence of chlorophyll.