Take two strips of black paper and paste it with paper clip on the broad leaf and exposed to sunlight for 2 days. Put few drops of iodine .What is it observation?
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if whole leaf is covered and then we are testing it then leafs colour will not change as the starch in the leaf is utilised in the 2 days . as leaf will not be able to prepare it's own food from 2 days due to absent chlorophyll ( covered). the leaf will dry out and can't convert glucose into starch
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