Stream of consciousness rationale: Cactus spines help the plant retain water by reducing air flow around the plant. Aerodynamic objects have smooth surfaces. Crassulacean acid metabolism is used by cactuses. Crassulacean acid metabolism is when a plant's stomata stay closed during daylight or times of drought to prevent water loss.
The question and answer pair are described below.
Q: Would an aerodynamic cactus benefit from more frequently closed stomata?
A: yes