1. elliptical 2. solar system
<span>The globin chains of myoglobin and hemoglobin prevent the oxidation of Fe2 to Fe3 , which irreversibly binds oxygen. The cooperativity of oxygen binding in hemoglobin arises from electronic interactions between heme groups.</span>
Your heart circulates your blood throughout your body everytime it beats.
Dendrochronologist
<span>Dendrochronology (or tree-ring dating) is the scientific method of dating <span>tree rings.</span></span>
