Question

the leaves of green plants use the energy in sunlight to convert atmospheric carbon into organic carbon through the reactions of photosynthesis. these reactions can be summarized by the following equation. 6 co₂ + 6 h₂o + light → c₆h₁₂o₆ + 6 o₂ gas exchange between the leaf and the environment is an integral part of the photosynthesis reactions. as carbon dioxide enters the leaf, the oxygen produced as a by - product of photosynthesis is released into the environment in a 1:1 ratio. enclosing a leaf within a lighted chamber allows for the rate of this exchange, and therefore the rate of photosynthesis, to be measured. the leaf was initially exposed to a constant light intensity of 300 μe/m²/s to stimulate photosynthesis. after this initial period, students incrementally increased the light intensity to investigate the relationship between light intensity and photosynthetic rate. figure 2.5 shows the light intensity (led irradiance) over time for a chamber containing a water hyacinth. figure 2.6 shows the change in carbon dioxide concentration over time for a chamber containing a water hyacinth. a decrease in co2 means photosynthesis is occurring co2 is produced faster when it is not exposed to sunlight an increase of co2 means photosynthesis is occurring all of the above

Explanation:

La fotosíntesis utiliza el dióxido de carbono ($CO_2$) para producir glucosa y oxígeno. Un decremento en la concentración de $CO_2$ significa que está siendo utilizado en la fotosíntesis. Cuando no hay luz solar, la fotosíntesis no ocurre y el $CO_2$ puede ser producido más rápido por procesos de respiración. Un aumento en $CO_2$ no significa que la fotosíntesis esté ocurriendo, sino más bien lo contrario en muchos casos.

Answer:

A. A decrease in CO2 means Photosynthesis is occurring