What is the dependency ratio?

A natural form of fertilizer would be

High responder crops of the green revolution produce tremendous yields

Evolution occurs as a result of

_________ habitat specialist found exclusively in one specific type of habitat.

We are usually referring to species diversity when we talk about biodiversity. However, genetic diversity is also important to ecological systems because diverse genes

Which of the following statements is true give the graph bellow:  

Which biogeochemical cycle does NOT have an atmospheric component?

The introduction of a predator onto an island originally free from predators is likely to cause the extinction of a native species.

Plants capturingcarbon dioxide from the atmosphere would be an example of