Lab section Name Your instructor may collect these end-of-exercise questions. If
ID: 147165 • Letter: L
Question
Lab section Name Your instructor may collect these end-of-exercise questions. If so, please fill in your name and lab section End-of-Exercise Questions Use the equations for photosynthesis and aerobic respiration to help you think about the questions. Remember, reactants decrease in concentration as products increase in concentration. Photosynthesis: light chloroplasts 6CO, + 6 H20 C6H1206 + 6O2 enzy mes CH 0s+60:mitochondria _+ 6co,+6H,0 + energy (ATP) 1. How does the P/R ratio change from summer to winter for a plant growing in Canada?Explanation / Answer
The P/R ratio refers to the ratio of production to respiration.
As the weather in Canada changes from summer to winter, the plants undergo stress conditions. The oxygen level decreases in the environment during the winter season as compared to the summer season and thus the P/R ratio decreases. The ratio decreases as the production or photosynthesis rate decreases as the availability of light energy also decreases in the winter season.
Thus for a plant growing in Canada the P/R ratio decreases in winter as compared to the summer season.
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