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stomata :) i think...
To minimize the rate of transpiration from leaf surface
In most cases it is at the underside of the leaf, as it does not want sunlight to dry it up.
Stomata are small openings on a leaf through which oxygen and carbon dioxide can move through.
the stomata are used to exchange water and air on the leaf surface.
stomata is present on a leaf's lower surface. but in plants that float on water, stomata is present on a leaf's upper surface, and the lower surface is protected by a coating of wax.
stomata :) i think...
To minimize the rate of transpiration from leaf surface
They are found on the upper surface of the leaf.
The water evaporates through the stomata during transpiration. The stomata are very small holes on the surface of the leaf.
The stomata on the underside of the leaf regulate transpiration. The leaf surface area helps to estimate the number of stomata, which could speed up or slow the rate of transpiration.
In most cases it is at the underside of the leaf, as it does not want sunlight to dry it up.
There are about 92 stomatas on upper surface and 39 stomatas on the lower surface. In a dorsiventral leaf number of stomata is more on the lower surface hence the above answer may please be verified
Tiny little pores on the leaf's surface called Stomata
Stomata are small openings on a leaf through which oxygen and carbon dioxide can move through.
The lower surface of the leaf has the stomata. You can see the reason for this if you cut a leaf in half from upper side to lower side. The upper portion of the leaf consists of tightly packed cells that are full of chloroplasts for taking in light. The lower half of the leaf is made up of loosely arranged cells. This allows room for air to enter the lower part of the leaf through the stomata and contribute carbon dioxide and take away oxygen. The upper surface of the leaf is covered by the cuticle which prevents dehydration, as such the stomata cannot be located or function on the upper surface
Potomageton natans is an aquatic plant and its leaves are floating on water. The upper surface of leaf being away from water has stomata for gaseous exchange from air, the lower surface remains in contact with water, therefore, stomata are present on the upper surface of these leaves.