The<span> duodenum is the first segment of the small intestine</span>
Atoms of different elements always combine in the same way.
John Dalton noted that if the components are added to one exacerbated, the share of their masses will dependably be the same. Dalton's been an English scholar. The component mass of that mix is measured by the confirmation of the presence of molecules assembled by John Dalton.
<span>Homeostasis is the ability to maintain a constant internal environment in response to environmental changes</span>
A) Crossing over is the mechanism of genetic variation that results from the exchange of gene segments between non-sister chomatids.
