Mutations can occur to any chromosome. During the formation of sex cells, a mutation can occur when. A. the chromosomes separate incorrectly and additional or not enough proteins are made. B. the chromosomes fail to separate. C. the chromosomes separate correctly and additional proteins are made. D. the chromosomes separate incorrectly and the proper amount of proteins are made.

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