Water escapes from the leaves of a vascular plant through the __________?

• A. Stomata
• B. Xylem
• C. Phloem
• D. Roots

Answer: (A)

Water escapes from the leaves through tiny pores called stomata. These openings are on the leaf surface and are surrounded by guard cells that regulate whether the pore is open or closed. When stomata are open, water vapor can exit the leaf in a process called transpiration, which also allows carbon dioxide to enter for photosynthesis. This water loss helps create the pull that moves water up the xylem from the roots to the leaves. The xylem itself carries water, but it isn’t where it leaves the plant; phloem transports sugars, not water vapor. Roots absorb water from the soil, but the escape happens at the leaf stomata.