As temperatures continue to rise,the photosynthetic rate reaches a maximum related to

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Quizplus · Accepted Answer

The photosynthetic rate is primarily determined by the enzyme called rubisco, which is responsible for converting CO2 into sugar during photosynthesis. Rubisco has a temperature response curve, which means that it is most efficient at a particular temperature and less efficient at higher or lower temperatures. As temperatures continue to rise, the rubisco enzyme becomes less efficient, leading to a decrease in the photosynthetic rate. Therefore, the photosynthetic rate reaches a maximum related to the temperature response of rubisco.

B, C, and D are not the best choices because they do not directly affect rubisco's temperature response or the photosynthetic rate. The thickness of the boundary layer, or the air layer that surrounds the leaf, affects the rate of gas exchange but does not impact the temperature response of rubisco. Soil temperature and oxygen availability also play a role in plant metabolism but are not the primary factors influencing photosynthetic rate at higher temperatures.

As Temperatures Continue to Rise,the Photosynthetic Rate Reaches a Maximum