Question

describe the starch test in a stepwise manner

Answer 1

Take one leaf from each of the plants. Put few drops of iodine solution on each of the leaves. The leaf kept in the sunlight will turn blue-black due to presence of starch. The leaf kept in the dark will not turn blue-black because of absence of starch.

Answer 2

Here Buddy:

Step 1: Take a fresh Leaf

Step 2: Boil the leaf in water so that the cells of the leaf soften

Step 3: Add drops of iodine on it

Observation: the leaf turns blue black in the presence of iodine

Conclusion: change in color of the leaf proves the presence of starch