The figure below an apparatus for measuring net photosynthesis by measuring the change in CO2 concentrations when a leaf is put into an illuminated chamber. Why might you also measure the change in CO₂ concentration in the dark? Is this statement correct, incorrect or irrelevant answer to the question. Measuring photosynthesis through a decrease in CO2 (CO2 uptake by the plant) over a short time in the light can help one create an estimate of gross primary productivity. In order to estimate net primary activity one needs to measure the decrease in CO₂ in the chamber in the dark to estimate energy loss through respiration Light source (a) Light O irrelevant O incorrect correct Sealed chamber Carbon dioxide sensor Leaf CO₂ CO₂ (b) Dark CO₂ Relyea, Ecology, 9e, © 2021 W. H. Freeman and Company

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Photosynthesis

Plants have a capacity that we humans can only imagine— the ability to produce food from sunlight. Sure, we can prepare some dishes that we can savor on, but it become possible because of the plants (as they serve as a producers of all the raw materials required). Photosynthesis is the method of assembling carbohydrates with the aid of sunlight.