Your answer would be A
Homologous chromosomes trade pieces of DNA.
When crossing over occurs, segments of non-sister chromatids break and then reattach to the other chromatid.
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<em>P</em><em>ulmonary circulation pumps deoxygenated blood through the pulmonary artery. This artery divides above the heart into two branches, to the right and left lungs, where the arteries further subdivide into smaller and smaller branches until the capillaries in the pulmonary air sacs (alveoli) are reached.</em>
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<span>Drugs known to form complexes with the sequestrants include thiazide diuretics, such as</span>
