Question 4 • AISD-Biology B CR (25-26)
Excessive heat can increase transpiration, the loss of water vapor from plants. If plants lose too much water, they may close their leaf pores to conserve it, reducing the carbon dioxide they take in for photosynthesis. So “Heat causes an excess of transpiration” describes a disruption that could affect photosynthesis.
AI-written and checked against the verified answer.