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Nature & Animals

Which effect results when high atmospheric ozone concentrations increase photosynthetic rates in plants?

A)Stomata closure reducing CO2 intake
B)Increased transpiration leading to wilting
C)Enhanced water-use efficiency increases yield
D)Downregulation of chlorophyll synthesis

💡 Explanation

When ozone concentrations increase, plants initiate stomata closure because ozone damages photosynthetic tissues; this response prevents ozone entry which limits CO2 uptake. Therefore, stomatal closure reduces CO2, rather than increased efficiency, wilting or chlorophyll inhibition which needs specific physiological events instead environmental protection.

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