Question

Why upper surface of the leaf has fewer stomata?

Answer 1

Upper surface of the leaf has fewer stomata to avoid much evaporation. As the upper portion of leaf is exposed to sunlight and wind there are more chances of water getting transpired from upper surface.So, plant would want to have less stomata on the upper surface of a leaf to reduce the rate of transpiration.
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Answer 2

$<marquee>HELLO shivangi</marquee>$
$<u>$$<b>upper</b>$ part of leaf have fewer stomata because on theupper part they are more exposed to sunlight and wind. There are many stomata at the lower part because it reduces the rate of evaporation as their is no much sunlight reaching their.
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