Question

An aquatic plant with floating leaves
A. Have stomata on leaf surface
B. Have stomata on lower surface
C. Have stomata
D. Have stomata only on upper surface

Answer 1

Hint: Aquatic plants float on the surface of the water and therefore stomata are not organized in the lower epidermis. Stomata are established on the upper epidermis due to the direct trade of gases between the leaf and the atmosphere. But in the terrestrial plants, stomata are present at the lower epidermis because this is an adaption to lessen the excessive loss of water through transpiration.

Complete Answer:
Aquatic plants that have floating leaves also said as emergent leaves that will have stomata. Those with under water leaves that are finely divided can absorb carbon dioxide directly from the water.

Water is substantial so there is no necessity for transpiration to help cool as well as transport water along with the minerals into the leaves. stomata on the underneath of the leaf are formed by a pair of sentry cells that legislate the size of the openings during gas exchange. Guard cells are generally open during the day and closed at night.

Air containing carbon dioxide as well as the water arrives through the stoma. Once the carbon dioxide along with the water are inside the leaf cells, the mesophyll cells utilize it to conduct the process of photosynthesis and respiration.

Let us find the correct answer:
A - Have stomata on leaf surface- Is not the correct answer to the given Question.
B - Have stomata on lower surface- Is not the valid answer to the above question.
C - Have stomata – It is not the right answer as they give stomach only on the upper surface.
D - Have stomata only on the upper surface – It is the appropriate answer to the above mentioned Question.

Therefore, the precise answer to the given question is option D “Have Stomata Only on upper surface”.

Note: In botany, a stoma also known as stomate is a pore, found in the epidermis of leaves, stems, as well as other organs, that regulates the rate of gas exchange. The pore is rimmed by a pair of specialized parenchyma cells called the guard cells which are accountable for restraining the size of the stomatal opening.