Which of the following is true about an invasive species? choose all that apply. a. they can crowd out native species b. they are beneficial to the environment. c. they can change entire habitats. d. they can cause unnatural competition.

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