During glacial periods in the early evolution of land plants, which of these is a beneficial adaptation regarding the number of stomata per unit surface area, and what accounts for it?

Question

Quizplus · Accepted Answer

During glacial periods, atmospheric CO₂ levels decrease, so plants with decreased numbers of stomata would be favored as they would be better at maximizing absorption of the limited atmospheric CO₂. This adaptation would allow plants to maintain a favorable balance between water loss and CO₂ uptake, which would help them survive in a dry, cold environment.

During Glacial Periods in the Early Evolution of Land Plants