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the correct answer is carbon dioxide
i hope this help if not wich or the multiple choose
i hope this help if not wich or the multiple choose
One immediate cause of a decrease in the rate of photosynthesis is a reduction in the availability of: carbon dioxide.
The factor with the greatest incidence on photosynthesis and plant growth is the concentration of CO2.
Chemical reactions that form organic compounds using carbon dioxide as a source are a factor in the rate of production during the dark stage.
The rates of these reactions increase by high concentrations of carbon dioxide, on the other hand, high concentrations of O2 inhibit this process.
The photosynthetic rate is also altered as a result of climatic changes, as a consequence of the increase in atmospheric carbon dioxide levels and the increase in global temperature.
The enzyme Rubisco catalyzes the assimilation and fixation of CO2 in the carbohydrate synthesis pathway.
If the concentration of CO2 is low, it functions as oxidase, and instead of helping to fix CO2, the oxidation of carbohydrates to CO2 and H2O occurs, and the process is known as photorespiration.
Therefore, we can conclude that one immediate cause of a decrease in the rate of photosynthesis is a reduction in the availability of: carbon dioxide, in the photorespiration process the plant consumes O2, the O2 displaces the CO2 from the active site of the enzyme, and this decreases the rate of CO2 fixation and the efficiency of photosynthesis.
Learn more here: https://brainly.com/question/20069255
