At which approximate light intensity does the oxygen production begin to level off? a. 40% b. 60% c. 80% d. 100%

Answer;

-40% or 40 percent

Explanation;

-The main factors affecting rate of photosynthesis are light intensity, carbon dioxide concentration and temperature.

-Without enough light, a plant cannot photosynthesize very quickly; even if there is plenty of water and carbon dioxide and a suitable temperature. Increasing the light intensity increases the rate of photosynthesis, until some other factor (a limiting factor) becomes in short supply.

-An increase in light intensity will produce an increase in the rate of photosynthesis until a level of light intensity is reached (normally 40%) above which the rate does not increase because the light saturation point has been reached and another factor (CO2 concentration or temperature) is limiting.