Question

b) the curve below illustrates the rate of transpiration related to the percent of open stomata on the leaf of a particular plant. explain why the curve levels off with increasing percentage of open stomata per area of the leaf. (2 points) open stomata versus rate of transpiration

Explanation:

As the percentage of open stomata increases, the rate of transpiration initially rises because more stomata provide more pathways for water - vapor to diffuse out of the leaf. However, the curve levels off because other factors such as the availability of water in the soil, humidity of the surrounding air, and the plant's capacity to supply water to the leaves become limiting. Once these factors are maxed out, increasing the number of open stomata does not further increase the transpiration rate.

Answer:

Other factors like water availability, air humidity, and the plant's water - supply capacity become limiting, preventing further increase in transpiration rate despite more open stomata.