Give a reason why most of the stomata of the water lilies are found on the upper side of their leaves?

it's urgent. thx a lot if u have answered the question.

Give a reason why most of the stomata of the water lilies are found on the upper side of their leaves?
stomata are mini factories that use sunlight to convert co2 gas and water to simple sugars [glucose] they also reverse and give off watervapor and oxygen ......stomata on the lower side wouldnot allow the rays of the sun to reach them...though certain rays could penetrate the the leaves...thewavelengths needed wouldnt be there
Reply:Because if they were on the lower side of their leaves, they would be in the water and called GILLS.
Reply:Stomata are used by the plant for gas exchange (carbon dioxide, water vapor, etc), since water lily leaves float on the water (think lily pad) only the top side can perform gas exchange. The underside is submerged in the water.

Hope this helps!
Reply:because its the only side of the leaf that get any oxygen