Living Environment Regents Practice Test 2026 – Complete Exam Prep

Transpiration is the process that describes the movement of water through a plant. It involves the evaporation of water from the surfaces of leaves, which creates a negative pressure that helps draw water up from the roots through the stem (xylem). This process is essential for maintaining the plant's hydration, nutrient transport, and overall health.

Transpiration also helps regulate temperature within the plant and plays a significant role in the water cycle by contributing to moisture in the atmosphere. While osmosis pertains to the movement of water across cell membranes, transpiration specifically refers to the movement of water vapor out of the plant. Photosynthesis involves the conversion of light energy into chemical energy but does not directly describe the movement of water. Evaporation refers to the phase change of water from liquid to vapor but does not specifically relate to the internal processes of water transport in plants.