Scientific hypotheses differ from scientific theories in that they are . possible, but not yet well-tested, explanations of data

facts rather than opinions

arrived at after extensive mathematical modeling

not able to be tested

widely accepted descriptions of observations in nature

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

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

Use the drop down menus to match each example to the fossil topic discussed then to show how the fossil record gives evidence of evolution