Question 18
(Multiple Choice)
Refer to the figure showing the results of Bjorkman and colleagues' studies of plant responses to different light levels. The plants were reared at three different levels of light intensity: high (red line), medium (blue line), and low (green line). The acclimatized plants were then subjected to various light levels, and their ability to photosynthesize was measured.
At the light intensity of 500 μmol/m2/s, the plants that are light-limited are those that are acclimatized to
A) high-intensity light only.
B) low-intensity light only.
C) both high-intensity and medium-intensity light.
D) both medium-intensity and low-intensity light.
Answer