Refer to the Figure Showing the Results of Bjorkman and Colleagues

question 46

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 approximately what light intensity level are the plants acclimatized to high-intensity light photosynthesizing at twice the rate of those plants acclimatized to low-intensity light?

• A) 100 ?mol/m²/s
• B) 300 ?mol/m²/s
• C) 600 ?mol/m²/s
• D) 1,000 ?mol/m²/s

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