Your answer would be B. Hope this helped :)<span />
Stored energy. Also this should have been listed under physics lol
Four chambered heart keeps oxygenated and deoxygenated blood separate and has double circulation while three chambered heart has a single circulation. Two chambered heart only has single atrium and single ventricle
The other two Domains being "Bacteria" and "Eukarya" (which includes us humans). Archaebacteria<span> are characterized by having different cell call components, coenzymes and RNA Sequences compared to bacteria. ... </span>Eubacteria<span> have a rigid cell wall. However, they can be both gram positive and gram-negative.</span>
Because they take up both parts of traits so that makes it group to similar organisms