Answers

2016-04-05T22:10:54+05:30
It is because of sunlight...the upper part of dicot leaf receive more sunlight as it is in front of it than lower part ......that why upper surface of dicot leaf much darker than lower surface
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2016-04-06T08:50:37+05:30
Upper side of a dicot leaf contain palisade parenchyma which has more number of chloroplasts than the lower side which contain spongy parenchyma.That's why upper side of a leaf is darker than lower side.
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