The map below shows the seas that covered North America during part of the Cretaceous period, approximately 100 million years ago. Which of the following choices is the best inference from this map about the species that lived on the three different landmasses - water, land, and ice?

What percentage of light hits earth's surface directly?

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

Which statements best describe the atoms of the gas neon? check all that apply