A C3 plant is growing in a hot, dry environment with closed stomata. Which condition will most likely increase the rate of photorespiration?
Q1. A C3 plant is growing in a hot, dry environment with closed stomata. Which condition will most likely increase the rate of photorespiration?
Answer: High O2 levels
Explanation: Photorespiration occurs when Rubisco binds O2 instead of CO2 under hot/dry conditions. Low O2 would favor the normal Calvin cycle.