Question Detail
Question
Plants that live in very dry conditions and, unlike other plants, open their stomata to fix CO2 only at night best describes
Correct Answer
Option C is the correct answer.
Detailed Explanation
CAM (Crassulacean Acid Metabolism) plants, such as cacti and succulents, adapt to dry conditions by opening their stomata at night to take in CO2 and fix it into organic acids, which are stored. During the day, they close their stomata to conserve water and use the stored CO2 for the Calvin cycle.
Hint
Which plants use a type of photosynthesis that separates carbon fixation and the Calvin cycle by time (day/night)?