During transpiration, plants primarily release which gas?

During transpiration, plants primarily release water vapor. Transpiration is a process where water moves from the roots of plants, through the stem, and evaporates from small openings called stomata located on the leaves. This process not only facilitates the uptake of minerals and nutrients from the soil but also helps in regulating the plant’s temperature and maintaining its water balance.

While oxygen is a byproduct of photosynthesis, it is primarily released during daylight hours when plants convert carbon dioxide and water into glucose and oxygen. Ozone is not released by plants during transpiration; instead, it is a gas that occurs in the atmosphere, primarily as a result of various chemical reactions involving sunlight and pollutants. Carbon dioxide is taken in by plants during photosynthesis, and although it can diffuse out of the plant, it is not a primary output during the transpiration process itself. Thus, the main gas released during transpiration is indeed water vapor.