Which biome is characterized by low water levels and high aridity?

• A. Tundra
• B. Taiga
• C. Desert
• D. Grassland

Answer: (C)

The desert biome is characterized by low water levels and high aridity, making it one of the most distinct and recognizable ecosystems. In deserts, precipitation is often less than 250 millimeters (10 inches) per year, which severely limits the types of plant and animal life that can thrive in such conditions. The high aridity means that evaporation exceeds precipitation, leading to dry soil and sparse vegetation.

In deserts, plants have adapted with features such as thick cuticles, deep root systems, and water-storing tissues to survive the long periods without rain. Animals in this biome have also developed various strategies to cope with the extreme conditions, including nocturnal lifestyles to avoid the intense daytime heat and physiological adaptations to minimize water loss.

By contrast, other biomes like tundra, taiga, and grasslands have distinct climate patterns and characteristics that support higher levels of moisture and varied vegetation. The tundra and taiga, for example, experience colder temperatures and some degree of seasonal precipitation, while grasslands support more plant life due to richer soils and more moisture than found in desert regions. Thus, the defining features of the desert biome, specifically its low water levels and high aridity, make it the correct choice.