Answer it plzzz... Share with your friends Share 0 Alok Kushwaha answered this First grow the plant and then put a leaf iodine solution if the leaf turns in blue black colour it shows presence of starch in leaf 0 View Full Answer ArᎥήa☘ . answered this When iodine comes in contact with starch a dark blue colour appears. By dropping iodine solution on the leaves, we can check the presence of starch. Regards.. 0 Pari answered this My is this 0 Indushree 660 answered this Please find this answer 0 Sanjeevani Majhi answered this When iodine comes in contact with starch a dark blue colour appear. By dropping iodine solution on the leaves we can check the presence of starch 0