UPSC Prelims 2013 question on Desert Plant Adaptations

Analysis

Plants growing in desert regions show several adaptations to reduce water loss through transpiration. Hard and waxy leaves reduce evaporation, while tiny leaves or absence of leaves minimize surface area exposed to heat. In many desert plants, leaves are modified into thorns or spines to further reduce water loss and protect the plant from herbivores. Therefore, all three modifications help desert plants conserve water.