Exam 23: Ecosystems and Populations

A scientist is studying the flow of energy into and out of a rain forest as well as the usage of energy by the organisms that inhabit that area. This study would be at the level of a(n)

Because a food chain underestimates the degree of complexity in most ecosystems, a food web is a more accurate depiction of the feeding relationships in an ecosystem.

The average fertility rate required to achieve long-term zero population growth is referred to as the

The ________ is an organism's role in its community.

Slow weathering of sedimentary rock makes "new" ________ available in the exchange pool found in soil.