Ultraviolet light has what effect on the bilirubin molecule?

When analyzing tree rings, what do scientists assume a thin ring indicates?

How is the national wildlife refuge system similar to the pacific region coastal program? a. both programs are concerned with providing habitats for wildlife b. both programs are primarily concerned with preserving fish species c. both programs have set aside 150 million acres of land d. both programs are under the u. s. fish and wildlife service

Differentiate renewable and nonrenewable resources