AP BIOLOGY

Detailed explanation-1: -Leaf photosynthetic rate is measured by enclosing a leaf in a closed, transparent chamber and measuring the decrease in carbon dioxide concentration as a function of time. Light flux density is measured outside of the chamber and must be corrected for the chamber transmittance, which is 0.9.

Detailed explanation-2: -7 Explain that the rate of photosynthesis can be measured directly by the production of oxygen or the uptake of carbon dioxide, or indirectly by an increase in biomass. Photosynthesis can be measured in many ways as it involves the production of oxygen, the uptake of carbon dioxide and an increase in biomass.

Detailed explanation-3: -Photosynthesis can be increased by raising the carbon dioxide concentration surrounding Rubisco, either by CO2-concentrating mechanisms used by C4 plants, cyanobacteria, and algae, or by enriching the atmosphere, which is happening as a result of the human use of fossil fuels.