I need some help with this, I'm not 100% sure I have all the right answers, could someone double-check this for me?

Competition occurs between species when

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

Kinases add - groups to other enzymes. this activities some enzyme while inhibiting other