Question

Calculate the percentage increase in the rate of photosynthesis at a light intensity of
1250 arbitrary units when the carbon dioxide concentration was increased from 140 ppm
to 1000 ppm.
Show your working and give your answer to the nearest whole number.​

Answer 1

Answer:There is a linear relationship between incident light and CO  

2

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 fixation rates at low light intensities. At higher light intensities, gradually the rate does not show further increase as other factors become limiting. What is interesting to note is that light saturation occurs at 10 percent of the full sunlight. Hence, except for plants in shade or in dense forests, light is rarely a limiting factor in nature.  

So, the correct option is 'Except for the plants in shade or in dense forests, light is a limiting factor for photosynthesis'.

Explanation: