Question

Loss of water from leaves will be less if stomata are

Answer 1

Answer:

If water loss is greater than water uptake, air bubbles can form in the xylem. Plants reduce water loss by closing their stomata, developing thick cuticles, or by possessing leaf hairs to increase the boundary layer.

Answer 2

Loss of water from leaves will be less if stomata are only on lower surface.

Explanation:

• Stomata are tiny pores found on the lower side of leaves that aid in the exchange of gases and water vapour. The rate of transpiration increases when the stomatal holes open and the rate of transpiration decreases when the pores close.
• Transpiration through stomatal pores on the leaf epidermis loses nearly all of the water necessary for plant growth to the atmosphere. Plants can optimise CO2 uptake for photosynthesis while reducing water loss by adjusting stomatal pore apertures.
• When conditions are unfavourable, some plants reduce water loss by closing their stomata. For example, when the humidity is low, water evaporates quickly from the leaf surface and plants seal or partially close their stomata to keep the water balance in the leaf steady.