Scientists use dna to track the migration of humans across the planet. after a group migrates away from their ancestral homeland, any mutations that occur are not mixed with those left in the ancestral population. therefore, dna samples taken from would have the most unique mutations, representing the most recent population to migrate to a new area.

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