This irrigated soil in Colorado can no longer be used for agriculture because of the accumulation of 
Definitions:
Convergent Evolution
The process whereby organisms not closely related independently evolve similar traits as a result of having to adapt to similar environments or ecological niches.
Coevolved Traits
Traits in different species that have evolved mutually through the process of biological interaction, such as predator/prey or parasitic relationships.
Biomes
Large community of plants and animals that occupies a distinct region defined by its climate, flora, and fauna.
Coral Reefs
Diverse underwater ecosystems held together by calcium carbonate structures secreted by corals, serving as habitats for a vast array of marine life.
Q20: What is the phenomenon indicated by the
Q28: You are chatting with a stranger in
Q29: Your friend Basdeo would like to become
Q33: The majority of coal mined in the
Q40: How are wilderness areas different from national
Q47: When comparing East Asian mothers with American
Q52: A person participates in a study that
Q52: _ is using less energy to accomplish
Q77: How is soil different from crushed rock?<br>A)Soil
Q91: Which of the following is NOT an