Explain why a continuous increase in carbon dioxide levels will not cause the rate of photosynthesis to increase continuously? Skip to main content

Explain why a continuous increase in carbon dioxide levels will not cause the rate of photosynthesis to increase continuously?

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Question: Explain why a continuous increase in carbon dioxide levels will not cause the rate of photosynthesis to increase continuously?

Photosynthesis is the process by which plants use light energy to convert carbon dioxide and water into glucose and oxygen. Carbon dioxide is one of the main factors that affect the rate of photosynthesis. However, a continuous increase in carbon dioxide levels will not cause the rate of photosynthesis to increase continuously. This is because photosynthesis is also limited by other factors, such as light intensity, temperature, and water availability. 


When one of these factors is low, it becomes the limiting factor that determines the maximum rate of photosynthesis. For example, if the light intensity is low, increasing the carbon dioxide concentration will not have any effect on the rate of photosynthesis, because the plant cannot use more carbon dioxide without more light. Similarly, if the temperature is too low or too high, the enzymes that catalyze the reactions of photosynthesis will not work efficiently, and increasing the carbon dioxide concentration will not increase the rate of photosynthesis.


Therefore, a continuous increase in carbon dioxide levels will only increase the rate of photosynthesis up to a certain point, after which it will level off or even decrease if other factors become limiting. This means that plants cannot keep up with the rising levels of carbon dioxide in the atmosphere due to human activities, and that more carbon dioxide will contribute to global warming and climate change.

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