A characteristic of plants in the desert biome is:

Desert plants have evolved to survive in extremely dry conditions, which is why a thick waxy coating is a characteristic feature of many species in this biome. This waxy layer, known as a cuticle, serves multiple purposes; it minimizes water loss by reducing the evaporation that can occur through the leaves. This adaptation is crucial in a desert environment where water availability is limited.

The other characteristics are less typical among desert plants. For instance, having large surface area leaves might increase photosynthesis but can also lead to greater water loss through transpiration, making this trait less favorable in arid conditions. Deep root systems are beneficial for accessing water, but not all desert plants develop them; some may have shallow roots that spread out to quickly capture any available moisture. Brightly colored flowers are often more associated with plants seeking to attract pollinators in lush environments rather than in harsh desert areas, where reproduction strategies might favor other adaptations.

Thus, the thick, waxy coating is a critical adaptation allowing desert plants to thrive in their environments by conserving water.