Take a healthy potted plant and tie black chart paper stripes on 4 leaves. Keep the plant in sunlight for 8 days and then pluck these leaves and test them in iodine solution after decolourisation. What will you observe and why ?
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you will observe that the iodine solution will not turn the leave into blue black colour.....this concludes that in that part of leave no start formation takes place.....it means light is necessary for plant leaves to make food starch
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