How would your perception of risk differ depending on if you were a business that produces
natural gas, or a homeowner with a private water well
near a hydraulic fracturing operation or a person in a
city who uses natural gas for heating and cooking?

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

What is the ecological role of food chains and food webs

Which of the following matches the organisms described with the correct domain? a. archaea--multicellular, eukaryotic organisms that do not have cell walls b. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sources c. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycan d. bacteria--unicellular, eukaryotic organisms that always lack cell walls