Do you think blue feathers are dominant or recessive?

In the practice of science, this type of reasoning is used to develop explanations.

Vessels draining the myocardium of the heart, open primarily ,into which chamber?

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