What is a Uniform Characteristic of Deserts

Question

What is a uniform characteristic of deserts?  
A) Low rainfall amounts
B) Uniformly high temperatures
C) Thick layers of topsoil
D) Void of animal life
E) Large leafy plants

Accepted Answer

Deserts are typically defined by low levels of precipitation, often less than 10 inches per year. This lack of rainfall creates a harsh and dry environment, which in turn influences the types of plants and animals that can survive there. While temperatures may vary greatly in deserts, they are generally not uniformly high. Thick layers of topsoil and large leafy plants are not characteristic of desert environments, and while deserts may be challenging environments for some animals, they are not completely void of animal life.