Which two layers of the atmosphere are responsible for the majority of solar radiation absorption?
a. stratosphere and troposphere
b. stratosphere and thermosphere
c. troposphere and thermosphere
d. troposphere and mesosphere

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